( 



^r 



500 BULLETIN' 1)4. UNITED STATES NATIONAL MUSEUM. 



PLATE XXI. 



Amhlystoma sp., viscera, drawn by Prof. .S. F. Baird. 



Fig. 1. AmMyntoma jnunlaliim. viscera, natural size, female; the digestive ami uro- 

 genital systeni.sdrawn sei)arately ; lettering as before : cl, cloaca ; June, 1>4«. 



'i. Amhlynloma 2)inict)itii)n, urogenital system of male, enlarged; letterinjr as 

 before ; May, l?-lt>. 



II. J»i?(///>i/o?»(i (j^KKwu)! Grav., malf, cloaca ; 1, vas ileferens; '2, ureter; I?, grcKivt- 

 from each vas deferens, which unites with its fellow at apex of iK'ninsnIa 

 (9), and is continued as a branch on each side, dividing and inclosini: tlic 

 process (4), ami, reuniting, passes round the jiosterior part of the folds of 

 inend)rane (.')) ; 4, oval, liesliy bodies, supported on short stems t'(nial td 

 themselves ; ">, a series of deep folds of membrane of each side, nearly meet- 

 ing inferiorly; (I, slight protuberance in the depression between the fdlils; 

 T, folds which arise between the bodies (4) as one, and, bifurcating, >iiik 

 away behiml the folds (."ii; "•, a second set of folds anterior to 7. 



4. Amhlyiitoina oiiaviim, liver from above; «, from below. 



.'). Heart and branchial vessels of Sinn I<tvi'rtina, dia rraniniatic; *(, transverse 

 section of hiillnis arttrio-iiii-. 



PLATE XXII. 



Choiidrotus leiiehrosiis, skeleton of law, i. from above, natural size. Fig. 1, skull Irniii 

 below ; "2, lower .jiiw and hyoid .(rches from above. From Salem, Ore;;()ii 



PLATE XXm. 



f.H 





m 



N 



ChondrotWf hnthrnniis, larva, natural si/e, from below, 



PLATE XXIV. 



Hyoid ajiparatus of Amhti/ylnitiidd : Figs. I, '2. and lidissected and drawn by Jii. K, E. 



(Jalt: the remaimler by FI.D.Cope. 



Fui. 1. ChondrotHH ti'nehnisng, from lielow ; !, 



2. Choiidrotiiii triKbroxiin, larva, fnuii :iliii\i': X "J. 



3. (' lioinlviit lis toil hnisiiy, larv:i, from below; x vj. 



4. (,'hoiidrotiin nterrimiiH. from lielow : 'L • 

 f). Chondrotim aterrimiis, from above ; ij. 



fl. Chondroliis parotiiiis, from below : ';. 



7. Choiidvotiis jKirotiiii.f, t'ii>\' above; ij. 



8. Clwndrotii'' di'Cdrliiiitiis, i'loin ]tv]iny ; ;j. 



9. CliDiidrolim ddiirlhatun.fvuin above; L 



10. LiiifjiKelapmni (unnilatii-i, from below ; f. 



11. LiiigiKvlitjiKiit iitniuldtiin, fnun abo\e; f. 



1-2. Li 



ni<jiiivt(i}>'iiin liiitii>ii>f, trom ai)ove 

 13. Liuguahipxun hittitru>i, I'rom lielow 



I'LATK XXV 



Hyoid apparatus i\f Amlihixtoiiiidd an<l l[iiiii>lnid<r ; P"'igs. I, 



and '.' dis-iitid 



drawn by E. 1). C'oiie; ',i-7 by E. K, Giilt, and lu, 11 from R. Wieder? 



Fk;. 1. Chcnidrotiii mia-ofitoiiuin, t'rnm \n'],t\v : x 1, 

 vJ. Choiidnitiia tiiicrvstomns, from sibove ; x 4. 



CIiiiii(Ir')tii<i li iiihi 



larva. si( 



x-2. 



