West American Mollusca. 223 



Mitra (?Costellaria) nodocancellata Stearns, 1. c. 213, pi. 

 xv. fig. 14. Gulf of California. 



Venericardia barbarensis Stearns, 1. c. 214, pi. xvi. figs. 3, 4. 

 Off Santa Barbara islands, California, in green mud at 276 fathoms 

 depth. 



Venericardia borealis Conrad, Am. Con., 39 (with fig.); 

 Stearns, 1. c. 215, pi. xvi. fig. 8; Gould, Inv. Mass.; Arcturtis rudis 

 Humphrey MS.; Cardita vestita Deshayes. Circumpolar. 



Venericardia ventricosa Gould. Stearns, 1. c. 216, pi. xvi. 

 figs. 5. 6. Puget Sound. 



Miodon prolongatus Cpr., Annals and Magazine of Natural 

 History, 3d ser., xiv. 424; Stearns, 1. e. 217, pi. xvi. figs, 7, 9. 

 Neeah bay, and Middleton island. 



Lucina .equizonata Stearns, I.e. 220, pi. xvii. fig. 34. Off Santa 

 Barbara islands, California, in green mud at 276 fathoms depth. 



Venus (Chione) effeminati Stearns, 1. c. 221, pl.xvii. figs. 1, 2. 

 Panama bay. 



Periploma discus Stearns, 1. c. 222, pi. xvi. figs. 1, 2. San 

 Pedro, Long Beach and vicinity, Los Angeles county, California. 



Periploma argentaria Conrad, Jour. Phila. Acad. Nat. Sci- 

 ences, vii. pt. II (1837), 238, pi. 18, fig. 8; Stearns, 1. c. 223, 224. 

 Dr. Stearns treats this as synonymous with P. plaiuscula Sby. 



Periploma planiuscula Sby., Proc. Zool. Soc. London, 1834, 

 p. 87; P. argentaria Conr., 1. c; P. alta C. B. Adams; P. Centicu- 

 laris Sby.; P. excurva Cpr.; P. excurvata Cpr., British Ass. report, 

 1856, p. 287. Synonymy as given by Stearns, 1. c. 224. Pacific 

 coast south of Point Conception. 



? Periploma papyracea Cpr., Proc. Zool. soc. London, 1856, p. 

 229. Stearns (1. c. 224), mentions this as a West American species 

 belonging to Carpenter's Mexican and Panamic province. 



Helix (Arionta) carpenteri Newc. variety indioensis L. G. 

 Yates, Nautilus, iv. 63 (also p. 51); Orcutt, Nautilus, iv. 67. Indio, 

 San Diego county, California, in the Colorado desert region. Dr. 

 Yates bases this variety on specimens collected by Dr. Stephen 

 Bowers. Specimens collected in the same vicinity by the writer I 

 have referred (Orcutt, 1. c.) to H. Traskii, of which I consider it to 

 be a well marked variety. Dr. Stearns (1. c. 206) refers to H. car- 

 penteri as a synonym of H. remondi, so that Dr. Yates' variety will 

 have to be referred to that, or a related species. 



Haliotis rufescens Swains. Hemphill, Nautilus, iv. 59; Or- 

 cutt, 1. c. 67. The geographical range is quoted as from Mendocino 

 county to San Nicholas island, California, and Santo Tomas land- 

 ing, Lower California. 



