240 
MARINE SHELLS OF WEST COAST OF NORTH AMERICA 
Type. Rimula noachina Linn. 
Distribution. Greenland, boreal America, Norway, North Britain, 
Tierra del Fuego. 
Puncturella cooperi Carpenter, 1864 
Supplementary Report, British Association for the Advancement of Science, 651. 
Proceedings of the California Academy of Sciences, 3:214. 
Outside like galcata, but without props to the lamina. 30-120 fm. not r. 
(Carpenter.) 
P. t. P. galeatae, fere exacte simulante; sed lamina interna solida, 
planata, haud antice sinuata, haud suffulta. Long., 0.30; lat., 0.21; alt., 
0.24; div., 70°. (Carpenter.) 
Shell almost exactly like P. galcata; but with internal solid flattened 
lamina, not sinuate in front, without props. (Translation.) 
Type in United States National Museum. Type locality, Catalina 
Island, California. 
Range. Kasa-an Bay, Alaska, to Santa Rosa Island, and San Pedro, 
California. 
Puncturella galeata Gould, 1846 
Plate 93, fig. 3 
Proceedings of the Boston Society of Natural History, 2:159. Report of the United 
States Exploring Expedition, Mollusca, 369, PI. 31, figs. 476-7. 
Testa solida, cinerea, elevata, globoso-conica, apice centrali, acuto, 
prorsum porrecto, striis filiformibus confertis radiata, et striis minoribus 
concentricis decussata: fissura brevis, fusiformis: apertura rotundato- 
ovalis; margine expanso, acuto, minutissime crenulato ; fornice costa trans- 
versali antice sufTulto, fossam trigonalem utroque latere formante. Long., 
%o ; lat., % 0 ; alt., % 0 poll. (Gould.) 
Shell solid, ashy-white, erect, elevated conic, with the outline somewhat 
convex; the apex central, elevated, acute, and reaching forward and 
upward. Surface radiated with numerous nearly equal raised lines, which 
are decussated by much finer concentric striae: fissure small. Aperture 
rounded-oval, the margin expanded and thinned to a sharp edge, which is 
minutely crenulated. The fornix is circularly arched over a short sulcux, 
and in front of it, near the summit, runs a transverse rib, leaving between 
it and the fornis, on either side, a triangular pit. The summit also appears 
to be filled with callus. Color greenish-white within. (Gould.) 
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