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 Spherium 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 prosocelous 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-- 
tish 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: 
