13. AMBLYSTOMA. 



45 



a-b. tf$. 



c. Several spec, hgr. 



d, e-g, h-l, m-q. S > 

 $,&hgr. 



r. Hgr. 

 •, 6- 



t-v. S2- 



IP, X. c? 2 • 



y, z. Hgr. & yg. 



a. <J. 

 0. ?. 

 y. 6. 

 8. $. 

 €-r). Young. 



e-i. 6 2-' 



k-X. Hgr. 



A. Axolotl form. 



Lake Chalco, near 



Mexico. 

 Lake of Mexico. 

 City of Mexico. 



Mexico. 



Mountain-lakes of 

 California. 



Bred in Paris. 

 Bred in England. 



B. Perfect form. 



New Jersey. 

 Kansas. 

 N. America. 

 Volcano of Orizaba. 

 Ciudad. 



Bred in the Jardin 

 des Plantes. 



Robert James, Esq. [P.]. 



Mr. Doorman TO 



I 



Rev. F. L. Hopkins [P.]. 

 C. Darwin [P.J. 



Prof. Owen [P.]. 

 Dr. A. Gunther [P.]. 

 Dr. A. Gunther [P.]. 



Leyden Museum. 

 M. Salle- [0.]. 

 Mr. A. Forrer [C.]. 

 Paris Museum [E.J. 



Prof. St. 



[P.J. 



George Mivart 



7. Amblystoma xiphias. 



Amblystoma xiphias, Cope, Proc. Ac. Philad. 18G7, p. 192 ; Strauch, 

 Salam. p. 64. 



Differs from A. tigrinum in the smaller head, distinct canthus 

 rostralis, and longer tail, which considerably exceeds the rest of the 

 animal. Yellowish-olive, brighter yellow beneath, with more or less 

 anastomosing or reticulating bands of well-defined brown on the 

 back and sides, and a few rounded spots of the same on the belly. 



Columbus, Ohio. 



8. Amblystoma trisruptnm. 



Amblystoma trisruptum, Cope, Pi'oc. Ac. Philad. 1867, p. 194 ; 

 Strauch, Salam. p. 64. 



Palatine teeth in four distinct patches, with decided intervals ; 

 they form one transverse series, nearly straight centrally, where 

 they are in a line with the posterior border of the choanae, but curv- 

 ing slightly backwards laterally ; the two central patches are wider 

 than the lateral, which vary a little in length, and are separated by 

 an interval half the diameter of the choanse ; their distance from the 

 exterior patches is about twice as great, the centre of the interval 

 falling about opposite to the inner border of choanae ; the outer 

 patches extend about half a diameter beyond the outer border of 

 choanae. Head very broad, much depressed, ovate, rather pointed 

 anteriorly. The remaining characters not different from those of 

 A. tigrinum. Uniform dark blackish or bluish brown, with a single 



