42 
MARINE SHELLS OF WEST COAST OF NORTH AMERICA 
Trichotropis kroyeri Philippi, 1849 
See Part II, Plate 31, fig. 14 
Zeitschrift fur Malakozoologic, 5:175. 
Tr. testa oblonga, umbilicata; cingulis obtusis parum elevatis tribus h\ 
anfr. supp., sex in ultimo; suturis profundissimis, fere canaliculatis; umbk 
lico infundibuliformi, angulo elevato, obtuso cincto; apertura ovato-oblonga 
utrinque angulata, angulo inferiore acutiore. Long., 14 y 2 ; diameter, 10^2 ; 
alt. apert., 8 Yi ; latit, ejus, 5^'". (Phillippi.) 
Shell thick, widely umbilicated; whorls 5, with distinct spiral ribs; 
umbilicus encircled by a rib; epidermis yellowish brown. 
Length, 1.5 inches. (Tryon, Manual of Conchology.) 
Type in ? Type locality, Spitzbergen. 
Range. Arctic and Bering Sea, eastward to Shumagin Islands. 
Trichotropis kelseyi Dali, 1905 
See Part II, Plate 31, fig. 8 
Proceedings of the United States National Museum, 34:254. 
Shell small, whitish, with a velvety, pale-olive periostracum, and three 
and a half whorls; spire very short; suture very deep, not channeled, but 
with the whorl in front of it elevated so as to make a shallow V-shaped 
trough; nucleus large for the size of the shell, turgid, nor distinctly marked 
off from the rest of the shell; sculpture of fine, even-rounded closely ad¬ 
jacent, spiral threads, a little more distant on the base, absent from the 
trough of the suture, with about 22 between the suture and the rim of the 
umbilical funnel; axial sculpture only of incremental lines; last whorl 
much the largest, rounded, produced basally, with a deep narrow funicular 
umbilicus, bounded by a rounded ridge corresponding to a siphonal fasciole ; 
aperture semilunate, rather narrow, produced and almost channeled in 
front; outer lip thin, arcuate, simple, sharp, not reflected; pillar lip thin, 
straight, sharp, elevated, connected across the body by a thin layer of 
callus with the outer lip; pillar absolutely smooth and simple, without any 
trace of plaits; operculum wanting. Height of shell, 6.2; of last whorl, 
5.5 ; of aperture, 3.5 ; maximum diameter, 4.0 mm. (Dali.) 
Type in United States National Museum, No. 110653. Type locality. 
U.S.S. “Albatross,” Station 2936, off San Diego, California, in 359 
fathoms. 
Range. Off San Diego, California, and Point San Quentin, Lower 
California. 
[ 644 ] 
