173 



2533 Scala Lowei 



"Shell small, conic, with 5 or more rapidly increasing whorls 

 after the (lost) nucleus; color white, whorls very convex with 

 deep sutures and a small, spiral umbilicus; there is no basal disk 

 or cord; sculpture of about 27 rather thick, strongly reflected, 

 smooth, close-set varices, and very close, fine, spiral threads, cov- 

 ering the whole whorl between the varices, and separated by about 

 equal sulci; aperture sub-circular, slightly higher than wide, the 

 reflected margin wide at the outer lip, patulous at the inner base, 

 narrow between the shoulder and the preceding whorl, and at 

 the shoulder produced into a short, rather stout spine which, re- 

 peated on successive varices, coronates the whorls. Length of 

 shell (without nucleus), 7, max. diam. of aperture 2.5 mm." — 

 Dall, Nautilus 20:44. 



Type locality: — Avalon, Catalina Island, Cal., in 40-60 fms. 

 (H. N. Lowe). 



2534 Kelsey, F. W. 



A healthy colony of Epiphragmophora tudiculata. Nautilus 

 20:61. 



2535 Sphserium Hendersoni 



Sterki, Nautilus 20:69. New Greeley, Colo. 



2536 Whiteaves, J. F. 



Notes on some land and fresh water shells from British Co- 

 lumbia. Ottawa Naturalist 20:115-119. 



2537 Cardium (Cerastoderma) fucanum 



Bering Sea, in 70 fms. — Monterey bay, Cal., in 20 fms. 



"Shell small, plump, compact, solid for its size, covered with 

 a smooth brown or gray periostracum usually more or less erod- 

 ed; form varying from nearly circular to slightly ovate, with 

 rather prominent slightly prosoccelous beaks, situated a little an- 

 terior to middle of shell; valves moderately convex, equal and 

 nearly equilateral, sculptured with 40-58 similar, small, low, flat- 

 fish radial ribs separated by much narrower interspaces; these 

 ribs are not nodulous or keeled, they are sometimes slightly rip- 

 pled by incremental lines, and, as usual, they are smaller, fainter, 

 and more crowded distally; interspaces rounded; near the dorsal 

 margins on each side of the beaks there is an ill-defined narrow 

 space which is devoid of ribs; the average number of ribs is about 

 50; the inner margins of the valves are crenulated; hinge delicate, 

 normal; inner surface of valves whitish, polished; outer surface 

 usually shows 3 or 4 concentric sulci due to resting stages. 

 Length 38, height 33, diam. 18 mm., of a fully adult specimen; a 

 shorter variety measures 25.5, 24.5 and 16 mm. for the same 

 dimensions." — Dall, Nautilus 20:112. 



2538 Scala Berryi 



"Shell small, white, 6-whorled; nuclear whorls polished, 

 smooth, without striated varices, on the last whorl about 20 or 

 21; these varices are quite close-set, not angulated in front of 

 suture and markedly reflected, with smooth interspaces; base with 

 no basal disk or cord, the coil imperforate, peristome rather cal- 

 lous on pillar side. Long. 3.5, max. diam. 1.75 mm." — Dall Nau- 

 tilus 20:127. Named in honor of S. S. Berry. 



San Pedro bay, in 200 fms. — Monterey bay, Cal., in 12 fms. 



2539 Scala rectilaminata 



"Shell very similar to S. berryi, with same number of whorls 



