196 PROCEEDINGS OF THE ACADEMY OP 



sphenoid teeth approaching near to the short oblique series of vomerines. 

 Fore limb to orbit, hind limb scarcely longer, reaching the eight fold from 

 behind. The inner digit on both extremities is so short, as to render the 

 numbers almost 3-3. Tail elongate, slender subcylindrical. Gular fold 

 represented by a line. 



Length of head to angle of mouth 2*5 lines. Breadth of head behind eyes 

 2 lines. Froni muzzle to humerus 5 lines. From muzzle to groin 16*5 lines. 

 Length of tail 17 lines. Length of posterior limb 3 - 5. 



Hub. -Santa Barbara, on the coast of Southern California. Sent to the 

 Smithsonian Institution by Dr. Hays. 



Spelerpes cephalicus. 



With the present addition to the Batrachian fauna of tropical America, it is 

 appropriate to enumerate the salamanders so far known from this region. They 

 are mostly natives of the mountainous sections, or of that elevated plateau 

 which presents us with most of the northern forms found in Mexico. 

 Geotriton* carbonarius, Cope, Pr. Ac. Nat. Sci., Phil., 1860, 373. North 



Eastern Mexico. 

 Geotriton adspersus, Peters, Monatsber. Acad. Berlin, 1863, 468. Bogota, 



New Grenada. 

 Spelerpes cephalicus, sp. nov. Table Land, Mexico. 

 Spelerpes orculus, sp. nov. Table Land, Mexico. 

 Spelerpes chiropterus, Cope, Pr. Ac. Nat. Sci., 1S63, p. 54. North Eastern 



Mexico. 

 Spelerpes bellii, Gray, Cat. Brit. Mus., 46, 1850. Cope, 1. c, 1860, 372. 



North Eastern Mexico. 

 Spelerpes lineolus, sp. nov. Table Land, Mexico. 



The form of the present species is more that of Amblystoma o p a c n m, and 

 is the shortest and stoutest seen in th% genus. Muzzle rounded, truncate, 

 with obtuse angles at the nares, its length from line connecting anterior can- 

 thus oculorum equal length of eyte. Distance between these canthus equal 

 from hinder canthus to nares. Breadth behind orbits equal length of tibia 

 and foot. Muzzle to axilla equal | distance from axilla to groin. Costal folds 

 (i. e., dorsal and lumbar vtsrtebrae) eleven. Tail swollen, little compressed, 

 constricted at base. Posterior limb stout, extending to sixth fold from be- 

 hind ; toes flat, depressed, margined, inner very rudimental. Inner and 

 outer digit of anterior limb similar ; the longest extend to the middle of 

 the orbit. Series of vomerine teeth nearly straight, not in contact. A post 

 gular fold. Skin everywhere finely wrinkled. Color dull black, paler on the 

 sides : lips and gular region minutely marbled with ashen. 



Length of rictus oris 2-75 lines. Length to axilla 6'8 lines. Length to 

 groin 16 lines. Length of tail 15 lines. Length of hind limb 5*2 lines. 

 Habitat. Mexican Table Lands, Dr. C. Sartorius. 



Spelerpes orculus. 



Form like that of S. chiropterus, (the inner digits being similarly ru- 

 dimental; but stouter, a body of equal length being thicker, and the head and 

 neck longer and larger ; the lip is not angularly truncate, and the color is uni- 

 form black. Costal folds eleven. Head elongate, broader behind ; muzzle 

 rounded, truncate, lip rounded ; eyes little prominent ; length of orbit equal 

 from orbit to nostril, and greater than between their anterior canthi. Ante- 

 rior digits to middle of orbit ; posterior extends to the sixth from the groin. 

 Tail' compressed, flat above. The digits are all short and flattened, not pal- 

 mate. Series of vomeiiue teeth very oblique, in contact medially. Postgular 

 fold distinct. 



From end of muzzle to postgular fold 3 - 8 lines. From end of muzzle to ax- 



*The genus recently named, by Du Bocage, Chioglossa, 1*. Z ?., 1S64, p. 204, appears to be not 

 different from Neurergus, Cope, Pr. A. N. S., 1862, 343. 



[Oct. 



