THE NAUTILUS. 

 NEW SPECIES OF WEST COAST SHELLS. 



BY MRS. IDA S. OLDROYD, STANFORD UNIVERSITY, CAL. 



Tiitonalia 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. S. N. M. 



Peden kincaidi n. sp. Plate IV, figs. 8, 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. 



