PLKTHODONTtN^. 



51 



against body ; fingers and toes moderate, cylindrical-dopressed ; carpal 

 and tarsal tubercles indistinct. Tail snorter than head and body, 

 subcylindrical at the base, becoming strongly compressed at the end, 

 which is obtuse. Skin shining, minutely pitted ; no parotoids ; a 

 strong gular fold; fourteen costal grooves, extending across the 

 body. Brownish black, a little paler beneath, sometimes with 

 greyish lichen-like spots on the sides. 



• Total length Ill millim. 



From snout to cloaca 59 



Head 10£ 



Width of head 9£ 



Fore limb 14 



Hind limb 16 



Tail 52 



United States — Austro-riparian and Eastern districts, west of the 

 Alleghanies. 



Smithsonian Institution [P.]. 

 (As Amblystoma jeffersonianum.) 



a-c. 5 • S. Illinois. 



d, e. 2 • N. America. 



Axolotes maculata, Owen, Ann. & Mag. N. H. 1844, xiv. p. 23 ; 

 Gray, Cat. p. 50. 



This larva I am not able to refer to any of the known species. 



a. Mexico. Prof. E. Owen [P.]. 



Subfam. C. PLETHODONTIN& 



Plethodontidse, part., Gray, Cat. Batr. Grad. 



Plethodontidse, Bolitoglossidee, Hemidactvlidae, Hallow. Jonrn. Ac. 



Philad. (2) iii. 1858. 

 Spelerpinse, Cope, Proc. Ac. Philad. 1859. 

 Pletliodontidse, Cope, Journ. Ac. Philad. (2) vi. 1866, and Proc. Ac. 



Philad, 1869. 

 Salamandrida Lechriodonta, part., Strauch, Rev. d. Salam., in Mem. 



Ac. St. Petersb. (7) xvi. no. 4. 



Synopsis of the Genera. 



I. Tongue attached along the median line to the anterior margin. 



Maxillary and mandibular teeth very large, few in number, com- 

 pressed 14. Anaides, p. 52. 



Teeth normal ; toes five 15. Plethodon, p. 53. 



Toes four 16. Batrachoseps, p. 58. 



II. Tongue free all round, attached by its central pedicel only. 



Toes five 17. Spelerpes, p. 60. 



Toes four 18. Manculus, p. 75. 



e2 



