﻿CADUCIBRANCHIATE URODELE BATRACHIANS. 353 



Syn. — Ambystoma mavortia, Baird, Journal Academy Natural Sciences of Philadel- 

 phia, vol. i. p. 292. 1850. 

 Habitat. — New Mexico. 



9. Ambystoma ingens. 



Char. — Head large, depressed, neck slightly contracted, color light brown or olive, 

 with numerous dark colored blotches (in spirits) ; internal nares small, transverse 

 palatine teeth, presenting a very obtuse angle in front, much less acute than in 

 nebulosum ; tail very greatly compressed, longer than head, neck and body ; extremi- 

 ties very stout ; fingers and toes much depressed ; body robust ; (the largest by far 

 of our Ambystomata.) Length 10 to 12 inches and more. 



Habitat. — New Orleans. 



One specimen in Mus. Acad, from Green's collection, (Dr. Bache.) 



Syn. Xiphonura Jeffersoniana, Tschudi. 



Gen. Memories. — This species and tigrinurn would come under the genus Xiphonura, 

 Tschudi, but several other of our Ambystomata have compressed tails, viz. : laterale, 

 talpoideum, nebulosum ; and as the substitution of Xiphgnura for Ambystoma leads to 

 confusion, we shall not adopt it, but prefer grouping them into Ambystomata with tails 

 much compressed, of which ingens may be considered the type, and those with tails 

 more or less rounded as venenosum and fasciatam ; Xiphonura Jeffersoniana, Tschudi, 

 is very probably Ambystoma ingens, but Salamandra Jeffersoniana, Green, is Plethodon 

 glutinosus. 



10. Ambystoma luridum. 



Char. — Teeth more acutely angular than in tigrinurn ; internal nares much larger ; 

 tongue quite broad ; color dark brown with yellow spots irregularly disposed, the 

 yellow predominating upon the body, throat and chin, being the ground color, the 

 chin and under jaw almost exclusively yellow ; tail much flattened, shorter and more 

 robust than in Mavortium ; body robust ; extremities very stout ; fingers and toes 

 moderately depressed ; fourth finger longer than first, third and fourth toes of nearly 

 equal length ; seventeen dorsal vertebras ; pelvis attached to seventeenth ; twenty-four 

 caudal ; no bony ridges upon posterior parts of cranium as in Peseudotriton ruber. 

 Length 7 inches. 



Habitat. — Michigan, Wisconsin, Illinois and Kansas, 



3 specimens in Mus. Acad., presented by Prof. Baird, Mr. Lewis Germain and Dr. 

 Hammond, U. S. A. 



Gen. Remarks. — There are four yellow spotted species, which are nearly allied, but 

 differ in the arrangement of the teeth, which will at once characterize each, viz. : 

 tigrinurn in a straight transverse row ; luridum obtusely angular ; episcqpus much 

 less obtusely angular, and finallv nebulosum Avhere the angle is acute. 



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