100 
Synonymy:—-Panopza norvegica Midd. (part). 
Recent in the Gulf of Alaska and Okhotsk Sea in shallow 
water, and in the Pleistocene of the same region. 
Shell chalky white with a black dehiscent tarry periostracum, 
which is rarely preserved even in the living animal, which tne 
valves only partially cover. 
1454 Cetoconcha scapha Dall. 
Type locality:—off Cocos Island, in 100 fms. 
1455 Terebratalia Hemphilli Dall. 
Pliocene of Santa Barbara, Cal. (J. Howard Wilson). 
ee ef ee 
1456 Dall, William Healey: 
Descriptions of new species of mollusks from the Pacific coast 
of the United States, with notes on other mollusks from the same 
region. US Nat Mus pr 34:245-257. 
Mentions numbers 1457-1477 inclusive. 
1457 Clystaxis? polystrigma Dall. 
Shell small, white, barrel-shaped, with the posterior part of 
the outer lip extending slightly beyond apex of shell; form much 
as in Haminea solitaria Say; apex sunken, imperforate, spire con- 
cealed; outer lip partly membranous and contracting in drying, 
shell normally covered with a thin periostracum, which in drying 
splits and contracts; sculpture of close, numerous, spiral rows of 
emphatic punctations, covering shell; aperture ample; outer lip 
thin and submembranous, its posterior extremity rounded over 
evenly to suture, anterior part not expanded; piliar lip thin, 
arcuate, margin reflected, forming a gutter just outside the mar- 
gin; body with little callus, only one whorl visible. Length of 
young shell, 2.8, maximum diam. 2.2 mm.; adult 3 times as long, 
soft parts do not envelop the shell. 
Type locality:—off entrance to San Diego harbor, Cal., in 50 
fms. (F. W. Kelsey). 
1458 Turris (Antiplanes) diaulax Dall. 
Shell small, acute, conic, brownish, with about 9 whorls; su- 
ture distinct, not appressed; surface smooth, except for incre- 
mental lines and 2 impressed shallow spiral channels near periph- 
ery of whorls; surface just behind each channel fs slightly raised, 
forming a flattish band about as wide and high as the channel is 
wide and deep; on the base and canal there are also some faint 
spiral threads; sides of spire flattish, the periphery nearest the 
succeeding suture, which is laid on the anterior edge of the ante- 
rior channel, thus giving the whorls a sort of overhang in appear- 
ance; aperture short and rather narrow; outer lip sharp, simple, 
produced; anal sulcus narrow and rather deep, situated just be- 
hind posterior channel; body without callus; canal short, wide, 
recurved; pillar lip arcuate, smooth. Height of shell 19, of last 
whorl! 10, of aperture 6.5, max. diam. 6.5 mm. 
anne locality: —off Coronado Islands, Baja Cal., in 34 fms., 
sand. 
1459 Turris (Surcula) ophioderma Dall. 
Based on Drillia inermis Hinds; Pleurotoma inermis Hinds, 
1844, (non Partsch 1843). 
1460 Turris (Surcula) rhines Dall. 
Synonymy:—Pleurotoma cancellata Cpr. 1863.—Drillia can- 
cellata Cpr. 
