THE NAUTILUS. 135 
NEW SPECIES OF WEST COAST SHELLS. 
BY MRS. IDA S. OLDROYD, STANFORD UNIVERSITY, CAL. 
Tritonalia fraseri n. sp. Plate IV, figs. 1 and 2. 
Shell of medium size, very elongate, narrow; whorls includ- 
ing the nucleus, which is present on nearly all the specimens 
collected, suture distinct and deep, whorls strongly shouldered, 
with six strong ribs spinose at the shoulder; body whorl with 
nine strong spiral cords and with incremental ones between. 
The shoulder is very strongly rugose, and has from one to two 
spiral cords, the second whorl! has four strong spiral cords and 
three incremental ones; the third has three strong spiral cords 
and no incremental ones; aperture elongate-oval, interior yel- 
lowish to purple-brown, columella thickened and nearly straight, 
canal long, straight and closed in the adult. It differs from 
the typical form in the very elongate form, and the absence of 
the basket-like sculpture in some specimens on the fifth and 
sixth whorl the basket sculpture shows faintly. 
Type locality is Brandon Island, Departure Bay, Vancouver 
Island. 
It is named in honor of Dr. C. Mclan Fraser, of the Domin- 
ion Station, through whose help we were given every facility pos- 
sible for collecting while at the Station in May, 1919. The 
type is in the Oldroyd Collection, Stanford University. Cotypes 
are at Dominion Station and U. 8. N. M. 
Pecten kincaidi n. sp. Plate IV, figs. 3, 4. 
Shell subcircular, the height and length being nearly equal; 
equivalve, both valves slightly convex; ears as in P. islandicus; 
base evenly rounded; color yellowish-white with reddish-brown 
markings. Left valve with 28 narrow round-topped imbricated 
ribs, and very faint intercalaries, the interspaces wider. Right 
valve with 25 broader flat-topped ribs, some of which are 
divided toward the margin. Anterior ear (the larger) with 7 
ribs, the posterior ear with 5 ribs. © This species resembles P. 
jordani Arnold, but the valves do not tend to contract suddenly 
at the basal margin as in P. jordani, and the right ear is larger. 
