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MAY-14-9? WED 1~~~8 F1SHE8Y ~ WILDi.IFE BIB FAY NCi, 9704915051
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<br />GtIFAT BAS(N NATUxAytsT
<br />Vol. 48.1V0. ~
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<br />- Late Ta,lbuo
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<br />, ~ AlP
<br />Tb YS ~r1y Tail ud
<br />('~• E. FAY iA) mwl Wte lB) tail6ud erntxyoio6,ica1 stages of razorback sw~CJwr. Ay~c~N'rr lcarsnr~a; chnrlna nr-
<br />mncnd • anlrnrp extended in "R." Lageed as Ry ! ~gnre 1 vrheo applicable. wd AV = awLltorY wniple
<br />Di = du(p-
<br />.
<br />eephskm. TC: e< krzr.'bat, t ~ lain. tdet . mrlrnexplialon, Myl = myc:toncel>~1ou. N $ autvehnerl. t'Bv _ o}xir
<br />cup. OY .. optu: rrairle, 7'E~ ~ t:u76ud, sued Ta = talencopAaton.
<br />tory vesicles at level of hitl~srairt; fixst pair lfudy ads. Kidney duucts {pronephric ducts}
<br />aF somites pmseat.
<br />Stage 1S: cavities is eye rnt#ments, 53 and dorsal aorGt fnrmGd ventral to neural
<br />tn~ and not,~hard; alimentary tract liincei
<br />bourn. tic plaeodGS elongated, trotiitainmb+ by endoderm and nearly complete; stoma-
<br />narrow vosIclea; hc+ad-Enid vi=ibie; sub- detun and prvc:tat~leatn riot apparent.
<br />cepi-alic pocket sad anterior intestinal ports] Stage 23: iin fold, tiay S, 103 bolus, 5J
<br />ve(ttrd m head. Auditory pltte~dds formed; mm. l'to fold appearfttg as tail and JwstGr~r
<br />14-lfi ors of sarniteA. dorsum; head gtvwing outward from yo[li
<br />Slsge 19. oval oyes, 57 hours, S.S mm (Fig,
<br />J H}. Qptic
<br />ilacod~es rottaci~l t
<br />l
<br />l sac. Cinuiatary >:ystutn formed; nasal pla-
<br />d
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<br />o aw
<br />; vtesiu
<br />es co
<br />es preseui, toil beginning to strnightcn.
<br />oot yet prat m auditory placocks; 30 prairs Stage Pro: blood circulation, 217 hours
<br />6.8
<br />of somltos. l"ail p~oc~s dLstingetisEutble•. ,
<br />mm {Fig. 3}. Head esttading froth yolk.
<br />Stage ~: ~tr1y tat~nd, t1,5 hvilts, 3.0 mm
<br />(Pik. ~). t>ptic vc~icks tlatteaerl on outer Heart visible within pericardial cavity;
<br />tlesx:d, sinus veetas~ts atu3 attrium lying above
<br />margins; lens fortrtittg, Auditory planodes orx3 teat of vantriole a(tct onnus arieriosis;
<br />with senull ve~elnv. Tailbad dtweiopcd, pro. endooardiu:n and epimyocar(Zium dis-
<br />truding fr+am yolk sphere. Foregut fnrmfgg, tingufsha5te_ 'it'hree viscera] (gill} arches
<br />gage 21: Late tailbucl, day 4, 78 hours, 3.8 farmed: pupils vis(ble within cyan. brown
<br />mm {>•!g. Sli}. Anterior potion o! c(ttLryo gigrnerst granui'~ea in eharpitl ~°ns. Yolk re•
<br />(head and anterior trunk) overlying yolk duced to c~y[iruier below body aais. B]nad
<br />sphere; poslcrriar portioust berior trutrk and
<br />~ flow: atrium - vmti'icld + trams arteriosus •
<br />tall} overlying CY
<br />j'idllt trlst~s. Optic vurttral aorta + bnutebial aiferentr+ - brati-
<br />stalks. cups, and lcnaes distingtttsllable. Pry. cllial efferetats + dormtl aorta aotl oitetnal
<br />eneephatoa tliviasd into tnlenton {fn-
<br />i~-rC cwre6rum} end di~GpLaba (future carotin artcriss + v;tGl~tu :utery ,caudal
<br />vR:iu ~ posterior cardinal vo~1n ~+ anterior car-
<br />epit3tatanlt~, tlxilanrtts, and hypotltslunus};
<br />rhombencephs(!on divided into moten- dinal aria vitelllne veins -+ comttwn eardirtat
<br />vein (Duct of Cuvier) • sinus venosus -+
<br />oephalon (future ct~beiLuo} ate myelen-
<br />cephalon {rnedvlla oblongata}. Heart ntdi- attiura. Embryos e~cirernely motile, moos be-
<br />ginni~,g tU rupture Chorion.
<br />rncat precept: tailbud lengthening, Gmbryo
<br />tnatilc within chorto Stage 85: geetaral fin rudiments, 1irA
<br />n.
<br />Stage ~~ ~+~ beat, 83 4.0 mm. houta, B.8 mm. Peotorrl fin atilagen apixar-
<br />ing posteriod and ventrad W auditory
<br />heart pt(lratioas uotaL Tai! at right angle to vesicles. Tst'I slightly apturned. Stotnadgwn
<br />P, 04
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<br />DCCG(t]tiCr 1
<br />FF
<br />C t3V
<br />Fib. 9. &nlu
<br />don put depict
<br />~!- ~ ca-pt+d
<br />DA ~ dorsal n
<br />vein, Sv ., situ
<br />clearly v~i7i
<br />yrotlc. Embry,
<br />beats.
<br />Stage 26:
<br />hours, 7.3 n
<br />protrude, si;
<br />Dead Conti(
<br />yolk.
<br />F:
<br />Stage 27:
<br />(F~g. 4). Pcct
<br />straiglltcturd
<br />antermrly ~
<br />rclatirc to bt
<br />eye pigmcn
<br />motile. flexiri
<br />movements.
<br />Stage 28:
<br />arcix*s visibf
<br />angaa to ~~
<br />~' CAF }'
<br />~:
<br />Pr's
<br />v:
<br />i
<br />Trig. A. t'rufar
<br />and AT ~ almr
<br />ity, Plti = tawt
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