100 



RE 11 SI ox OF AMERICAN MOLES— TRUE. 



VOL. XIX. 



,'*-, 



10.4 mm.; breadth between posteroexternal angles of first molars, 

 C.l mm. 



Di.stt'ibntioii. — Pacific Coast of jS"ortb America west of the Cascade 

 and Sierra Nevada ]Moantaius, from Fraser Itiver, Britisli Cobimbia, 

 to Shasta County, ( 'alifornia, and thence southward along the coast to 

 San Francisco P>ay. 



DESCRIPTION. ' 



P>ody depressed. Head conical, with an elongated snout, which is 

 rugose, naked above as far back as the line of the incisors, and terini- 

 uates in a pad or button. Nostrils comma-shaped, lateral, in the sides 

 of the lateral pad. Upper li[) with a sharp ridge, 

 which is emarginate anteriorly and joins a triangular 

 naked median area whicli 

 runs forward to tlie end of 

 the snout, as in Panisvalops 

 and *S'('rt/oji6'. 



Eye moderately large for 

 this family, concealed in the -^^ 

 fur, but not covered by mem- - 

 brane; situated above and 

 somewhat behind the corner 

 of the mouth. No external 

 ear. Auricular orifice large, 

 of varying contour, according as the surrounding integuments are 

 tense or lax. 



Fore feet broad, scaly above and warty below; palm longer than 

 broad. Back of the toes each with three or four large scales. Toes not 



webbed. Second, third, and fourth toes sub- 

 equal and largest, with broad acute nearly 

 straight claws which are half as long as the 

 palm. First and fifth toes shorter and with 

 shorter claws. Fifth claw reaching to the 

 base of the fourth; the first to the middle of 

 the second. 



Hind feet nearly twice as long as the fore 

 feet, narrow; covered above with rounded 

 scales and sparse hairs; below scaly, naked, 

 with six tubercles, of which one is at the 

 base of the conjoined third and fourth toes, 

 one at the base of the second and third toes, 

 two others at bases of first, second, and fifth toes, res[)ectively, and 

 two more near the middle of the sole. Second and fourth toes subequal 

 and longest; first and fifth shorter. 



Claws of the second, third, and fourth toes as long as the toes them- 

 selves, compressed, acute, gently curved and twisted inward at the 



3it. ii 



SNOUT OF NEUBOTRICHUS UIBBSII. 



Fig. ;{0, Upper surface. Fig. 40, Lower surface. 



(Twice natural size.) 



41. 42. 



FORE FOOT OF NEUROTKICHUS GIBBSI 



Face. Fis. 4-.>, Up] 



Fi|;.4l,Lo 



surfaci 



(Twi, 



alMie.) 



1 No. 10717, U.S.N.M. Siiniahmoo, Wash. Male, young. Alcoholic. 



