1915.] 



GENUS SCAPANUS. 



55 



(fig. 8). Head coiioidalj depressed. Nose elongated into a snout 

 (shorter and less truncate than m Scalopus), the apical portion naked 

 to line of anterior edge of nasals; nostrils superior, crescentic, with 

 concavities turned in laterally (fig. 9). Eyes minute, concealed in 

 fur. Auricular orifice small. Legs short and stout. 

 Feet large, fleshy, scantily haired above, naked below. 

 Fore feet handlike, the palms as broad as long (fig. 

 10). Soles of hind feet with one to three (usually 

 two) distinct tubercles. Fore toes and hind toes not 

 webbed. Claws of fore feet broad, flat, and heavy; 

 those of hind feet relatively short and weak (fig. 11). 

 Fur dense, soft, silky, the hairs nearly equal in length, 

 producing a velvetlike pelage. Mammae, 8: latero- 

 pectoral, 2-2; latero-abdominal, 1-1: inguinal, 1-1. 



81c eletal characters. — Clavicle short and heavy, about 

 three-fourths as broad as long, distinctly notched on 

 the inferior border, not penetrated by a foramen. 

 Humerus heavy, about three-fourths as broad as long. 

 Pelvis narrow, bones of opposite sides scarcely touch- 

 ing under acetabula; two osseous bridges, each bifur- 

 cate posteriorly, connect sacral vertebrae with ischium 

 and produce six foramina or openings, a large one in 

 each of the anterior angles formed by median lines of 

 acetabula and sacral vertebrae and two smaller ones in each of the 

 posterior angles. Superior surface of last sacral vertebra without 

 longitudinal process. Os f alciforme relatively broad and long, reach- 

 ing proximal end of terminal phalange of first digit, gently incurved, 

 not much tapering distally. 



Skull conoidal, flat, with relatively broad braincase, and slightly 



constricted in terorbi tally. Mas- 

 toids moderately heavy, not prom- 

 inent. Interparietal large, some- 

 what rectangular, breadth (antero- 

 posterior diameter) about one- 

 third the length, slightly convex 

 anteriorly and concave posteriorly 

 with a posterior median projection. 

 Frontal region flat, not much slop- 

 ing; frontal sinuses somewhat 

 swollen. Eostrum moderately long; anterior ends of premaxiUse 

 slightly thickened and extending beyond nasals, forming a notch 

 (acute to truncate) anterior to nasals. Anterior nares opening for- 

 ward. Zygomata moderately long and heavy, rather sharply 

 curved inward anteriorly, the posterior end attached about mediaUy 

 on squamosal. Foramen magnum oval, of moderate size. Infraorbital 



B2014-103 

 Fig. 8.— Tail of Sca^ 

 panus latimanus lat- 

 imanus (X 1^). No. 

 105258, U. S. Nat. 

 Mus.; from Colma, 

 San Mateo Comity, 

 Cal. 



Tig. 



B2015-103 



.—Snout of S.l. latimanus (XI J). Individ- 

 ual referred to in fig. 8. 



