13. AMBLYSTOMA. 47 



Vab. laterale. 



Ambystoma laterale, Hallow. 1. c. p. 352. 

 Amblystoma jeffersonianum, var. laterale, Cope, I. c. 



About balf the size of the typical form. Black with large white 

 spots on the sides and tail, and smaller ones on the belly. 

 Canada : N.E. United States. 





Var. platineum. 



Amblystoma platineum, Cope, I. c. p. 198 ; Strauch, Salam. p. 65. 

 jeffersonianum, subsp. platineum, Cope, Check-list, p. 26. 



Distinguished by the narrower head and more elongate body. 

 Colour leaden ; eyelids yellowish-margined ; lower surfaces with or 

 without numerous indistinct whitish blotches. 



Ohio. 



10. Amblystoma persimile. 



Plethodon persimilis, Gray, Proc. Zool. Soc. 1859, p. 230, pi. 19. 



f. 2 ; Giinth. Rept. Brit. Ind. p. 439. 

 Pectoglossa persimilis, Mivart, Proc. Zool. Soc. 1867, p. 698. 

 Amblystoma persimile, Strauch, Salam. p. 65. 



Palatine teeth in four scarcely interrupted series forming a nearly 

 straight line; these series extending laterally beyond the outer 

 border of the choanse. Tongue rather large, plicae radiating from 

 behind. Head small, moderately depressed, longer than broad ; 

 greatest width at angles of jaws ; snout moderate, rounded, with- 

 out canthus rostralis ; eyes moderate. Body elongate, cylindrical, 

 thrice and a half the distance from snout to gular fold. Limbs 

 moderate ; when adpressed against the body, the tip of third finger 

 meets the tip of fourth toe ; fingers and toes long, slender, scarcely 

 depressed; carpal and tarsal tubercles not distinct. Tail shorter 

 than head and body, moderately compressed, not keeled, ending in 

 a point. Skin smooth ; parotoids indistinct ; a strong gular fold ; 

 twelve costal grooves. Blackish, with small scattered whitish spots T 

 largest on the sides. 



Total length 98 millim. 



From snout to cloaca 53 ,, 



Head 11 „ 



Width of head 9 „ 



Fore limb 16 „ 



Hind limb 18 „ 



Tail 45 „ 



Siam. 



a-b. <j>? Siam (probably at a considerable M. Mouhot [C], 



altitude). 



