135 



Hemphill, Nautilus 11:74. Salmon river Mts., Idaho. 



1940 Prophysaon humile 



Cockerell, Nautilus 11:79. Notes on a Cceur d'Alene example. 



1941 Sigaretus Oldroydi Dall. 



Shell large, thin, naticoid, with a short spire and 3-4 inflated 

 whorls; color pale Drown, livid on the spire, fading to waxen on 

 the hase; surface sculptured with extremely fine wavy spiral 

 striae; aperture ample, oblique, outer lip thin, a little patulous, 

 the body covered with a thin callus, pillar lip obliquely cut away, 

 wide near the junction with the body, basal part of margin re- 

 ceding; umbilicus large, pervious, its walls covered with a thin, 

 silky, brown wrinkled epidermis. Alt. 35, diam. 37 mm." — Dall, 

 Nautilus 11:85-12:85. 



Type locality: — off Catalina Island, Cal., in deep water (Mr. 

 and Mrs. T. S. Oldroyd). 



1942 Pecten Palmeri Dall, Nautilus 11:85. Gulf of Cal. (Ed- 

 ward Palmer). 



1943 Pecten Davidsoni 



On the Davidson bank, Alaska, in 280 fms., green mud, and 

 north of Unalashka, in Bering Sea, 351 fms., sand. 



"Shell small, suborbicular, compressed, waxen white, left valve 

 with 21 rounded ribs, surmounted by (when not worn off) con- 

 tinuous rows of minute subglobular scales, the interspaces wide, 

 flat and perfectly smooth, ears very small, the interior with 5 or 

 6 imbricated radii; sculpture obsolete near the umbones; right 

 valve sculptured with faint concentric impressed lines over 

 the whole surface, and distally with numerous minute, obsolete, 

 fine, scaly riblets; posterior ear transversely striated, very small, 

 anterior one with 4 or 5 scaly radii, a well marked sinus leaving 

 an imbricated fasciole and no stenolium. Interior polished, the 

 left valve fluted internally in harmony with the external riba. 

 Alt. 14, lat. 14, diam. 3.5 mm." — Dall, Nautilus 11:86. 



1944 Pecten Randolphi 



"Shell small, thin, glossy, unsculptured, except by minute 

 'camptonectes' striation which covers both valves, and more or 

 less obscure concentric undulations which are most distant on 

 the right valve near the umbo, and in some specimens altogether 

 absent; hinge straight and short, anterior ears distinct, posterior 

 ears not defined by any fold or sinus, outline suborbicular, valves 

 compressed, especially the right one; right anterior ear with 6 

 small imbricated radii above, below a wide, transversely striated 

 fasciole derived from a well marked byssal sinus; cternolium with 

 4 or 5 functional spines. Alt. 27.5, lat. 26, diam. 5 mm."- — Dall, 

 Nautilus 11:86. 



Type locality: — off Destruction Island, Wash., in 5-6 fms. 

 Occurs from Bering Sea to West Mexico, in 225-1005 fms. Named 

 in honor of P. B. Randolph, of Seattle, Wash. 

 o 



1945 Pilsbry, H. A. and E. G. Vannatta: 



Revision of the North American Slugs: Binneya, Hemphillia, 

 Hesperarion, Prophysaon and Anadenulus. Phila ac pr 1898: 

 219-261, t 9-16. Not seen. 



1946 Bifidaria Ashmuni 



Sterki, Nautilus 12:49. Arizona and N. M. 



