CLASS GASTROPODA 
25 
plicate, with about seven folds to each whorl; aperture oval, white within, 
angular above; anterior canal quite long, open, straight; outer lip thick¬ 
ened within, bearing six small tubercules; columella nearly straight; with 
a whitish callus projecting slightly at beginning of canal. Length of 
shell, 16; diameter, 8; length of aperture, 9 mm. (Ford.) 
Type in Philadelphia Academy of Natural Sciences? Type locality, 
Cayucos, San Luis Obispo, California. 
Range. Orcas Island, Washington, to Gulf of California. 
Tritonalia fraseri I. Oldroyd, 1920 
Plate 30, figs. 11, 11a 
Nautilus , 33 :136; PI. 4, figs. 1, 2. 
Shell of medium size, very elongate, narrow; whorls including the 
nucleus, which is present on nearly all the specimens collected, suture 
distinct and deep, whorls strongly shouldered, with six strong ribs spi- 
nose 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 yellowish 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 speci¬ 
mens on the fifth and sixth whorls the basket sculpture shows faintly. 
Length of shell, 20; of aperture, 10; breadth, 9 mm. (Oldroyd.) 
Type in Oldroyd Collection, Stanford University. Type locality, Bran¬ 
don Island, Departure Bay, Vancouver Island. 
Range. Known only from type locality. 
Tritonalia barbarensis Gabb, 1866 
Plate 30, fig. 5 
Proceedings of the California Academy of Sciences, 3:183. 
M. t. unicolor, fusca; varicibus v-ix, haud magnis as angulum auctis; 
varix ultima praelata; anfractu, primo laevi, anfractibus v supra recte trun- 
catis, infra parum convexis; tota superficie liris spiralibus et squamosis 
induta; apertura subelliptica, intus lactea; labio incrassato, polito; labro 
extante, tuberculis intus omata; canali interdum recto, interdum recurvato. 
Long., .77; lat., .46; long, aper., .2; long, canal, .24 poll. 
Shell small, brown; whorls six, the first smooth, the remainder angu- 
lated, horizontally or a little concavely truncated above and very slightly 
convex below the angle; varices variable, from five to nine, usually about 
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