40 



SAIAMANBRID^. 



III. Series of palatiDS teeth between the choane ; plicae of tongti 

 radiating from a median longitudinal groove ; fourteen cost! 

 grooves. 



Lower jaw shorter than snout 16. cingulafmn, p. 50. 



Lower jaw longer than snout 17. microstomum, p. 50. 



1. Amblystoma talpoideum. 



Amblystoma ? talpoideum, Gray, Cat. p. 36. 

 Salamandra talpoidea, Holor. N. Amer. Jkerp. v. p. 73, pi. 24. 

 Arbblvstoma talpoideum, Dum. <^ Bihr. p. 109; Cope, Proc. At 

 JPhilad. 1867, p. 172 ; Stn-auch, Salam. p. 63. 



Shortest, stoutest, and most clumsily formed of all the Amhly 

 stomata. Differs from A. opacum in the following characters :— 

 Head broader ; upper jaw visible beyond the lower, when viewe( 

 from below ; eyes rather small. Tail higher. Ten costal grooves 

 Dark brownish or liver-black ; upper surfaces irregularly sprinkled 

 blotched and marbled with silvery grey of a lichen-like character 

 Size of A. opaeum. 



S.E. United States. 



2. Amblystoma opacum. 



Amblystoma opacum. Gray, Cat. p. 36. 

 palamandra opaca, Gravenh. Vebers. Zool. Syst. p. 431, and Belie 



p. 75, pi. 10 ; Dum. Sr Bibr. p. 66. 

 fasciata. Green, joum. Ac. PhUad. i. 1818, p. 350 ; Sdlhr. iV 



Armr. Herp. v. p. 71,- pi. xxiii.; Dehay, N. Y. Faun., Rent 



p. 77, pi. 17. f. 40. 

 Ambystoma opaca, Baird, Joum. Ac. Philad. (2) i. 1860, p. 283. 



fasciatum, Bum. Sr Bibr. p. 106, pi. 101. f. 6. 



Amblyatoma opacum. Cope, Proc. Ac. Philad. 1867, p. 173 ; Strauch 



Salam. p. 63. 



Palatine teeth in three series on a line behind the choanse ; medial 

 series in a double arc, the convexity of which is turned backwards 

 lateral series about half the length of the central, separated fron 

 the latter by a decided interval. Tongue large, plicse radiating 

 from behind. Head depressed, a little longer than broad, greates 

 width at angles of jaws ; snout broad, rounded, without canthui 

 rostralis ; eyes moderate. Body slightly depressed, measuring twici 

 and a half or twice and two thirds the distance from tip of snou 

 to gular fold. Limbs moderate ; adpressed against the body, thi 

 longest fingers and toes meet ; fingers and toes not very thick, de 

 pressed; carpal and tarsal tubercles generally indistinct. Tai 

 shorter than head and body, thick at the base, becoming graduall' 

 compressed at the pointed tip, not keeled. Skin shining, clo.sel' 

 pitted, especially on back and tail ; parotoids indistinct ; a stronj 

 gular fold ; a rectilinear fold from the angle of the mouth to thi 

 latter ; eleven costal grooves. Purplish black ; back and uppe: 

 half of tail with bluish-grey transverse bars. 



