100 



Synonymy: — Panopsea 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). 

 o 



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. U S 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; pillar 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 is slightly raised, 

 forming a flatfish 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 flatfish, 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. 



Type 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. 



