126 SOUTHERN CALIFORNIA ACADEMY OF SCIENCES 
Bulletin Proe. Biol. Soe. Wash., Vol. XVII, pp. 1-16, for genera 
and subgenera of this and the following. 
Odostomia (Ivara) turricula Dall and Bartsch. 
San Diego, Mr. Henry Hemphill. Iden. Dr. Dall. 
This is the type of the Subgenus Ivara Dall and Bartsch. It 
has been labelled Mumiola, turricula De Folin by conchologists. 
Memoirs Cal. Acad. Sciences, Vol. III, page 285, plate IV, fig. 14 
CACIDA 
Genus Cecum Fleming 
Cecum magnum Stearns. | 
Dredged in San Pedro Bay by Herbert Lowe and myself. In 
San Diego, 15 fathoms by Prof. F. W. Kelsey. The San Pedro 
shells are not perfect, but I think there is no doubt about the 
San Diego specimens being correctly named. Memoirs Cal. 
Acad. Sciences, Vol. III, page 298, plate 8, fig. 16. 
VERMETIDA 
Genus Vermetus Adamson 
Vermetus centiquadrus Val. 
Marine Ways, San Diego, Mr. Henry Hemphill. 
LITIOPIDA 
Genus Alaba H. and A. Adams 
Alaba oldroydi Dall. 
Terminal Island, in drift, San Pedro, dredged 10 fathoms. 
Through the courtesy of Dr. Dall the name of this shell has, 
for some time, been known to West Coast students. He has 
only recently deseribed it in The Nautilus, Vol. XIX, page 15. 
RISSOIDA 
Genus Rissoa Frémenville 
Section Amphithalamus Carpenter. 
Amphithalamus inclusus Cpr. 
San Diego, Cal. Collected by Mr. Henry Hemphill, and iden- 
tified by Dr. Wm. H. Dall. . This is the type of Carpenter’s 
section Amphithalamus. Tryon’s Man. Conch. Vol. IX, page 
auf: 
