65 
Volume 21. Number 9. September, 1919. Whole Number 173. 
CHCHOHOHOHCHOHOHOHCHOHOHOHOHOHOHOHOLOHOHOHOHCHOHOHOHOHOHOHCHOHCHGHCHOHCHOHCHSHCHSHSHEMSMSIED 
THE WEST AMERICAN SCIENTIST 
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A Popular Review and Record for the Pacific Coast. 
The oldest scientific magazine west of the Mississippi. 
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21:0992 Lacuna unifasciata Cpr. 204. 
Shell brown, glossy, color broken into dots on keel of body 
whorl; aperture semilunar. San Diego, Cal. 
21:0993 Lacuna variegata Cpr. 203. 
Shell tall, effuse, with wide chink; clouded in color or with 
zigzag stripes. On eel-grass, British Columbia to San Diego, Cal. 
21:0994 Genus Leda Schumacher, 1817. 
Shell resembling Nucula; oblong, rounded in front, pro- 
duced and pointed behind; margins even; pallial line with a 
small sinus; umbonal area with a linear impression joining the 
anterior adductor. 
21:0995 Leda navisa Dall, 1916. 
Farallones Islands, to San Diego, Cal. 
21:0996 Leda penderi Dall, 1910. 
Queen Charlotte Islands, to Santa Barbara Islands, Cal. 
21:0997 Leda buccata Steenstrup, 1942. 
Arctic Ocean, and Bering Strait; Atlantic. 
21:0998 Leda liogona Dall, 1916. 
Bering Sea in 1401 fathoms. 
21:0999 Leda pernula Muller, 1779. 
Arctic Ocean to Plover Bay; Atlantic. 
21:1000 Leda radiata Krause, 1886. 
Arctic Ocean; Plover Bay, Eastern Sibera; Othotsk and Ber- 
ins Seas. 
