181 



2684 Cypraea Amnettae 



Dall, Nautilus 22:125, the C: Sowerbyi of the Gulf of Cal. — 

 name preoccupied. 



2685 Trivia Calif orniana Gray 1828. 



Erroneously given in literature as Californica fide Dall. 



2686 Bifidaria bilamellata 



Sterki & Clapp, Nautilus 22:126; in drift about 8 miles east 

 of Quartzsite, Yuma Co., Arizona. 



2687 Lymna*a hendersoni 



Frank C. Baker, Nautilus 22:140. West of Ft. Collins, Colo. 



2688 Sphaerium Pilsbryanum 



Sterki, Nautilus 22:141. Fossil, on shore of Bear Lake, Utah. 



2689 Carinfex santaeclarae 



Hannibal, Nautilus 23:40. Santa Cruz Mts., Cal. (Pliocene) 



2690 Pisidium Marci 



Sterki, Nautilus 23:42. Mt. Leidy, Utah, 10,000 ft. in a stag 

 nant pond (Marcus H. Dall). 



2691 Valvata Calli 



Hannibal, Nautilus 23:107. Upper Lahontan Querternary, 

 near Summer Lake, Oregon (F. M. Anderson); also Central Ne- 

 vada. Named in honor of Robert Ellsworth Call. 



2692 Valvata Whitei 



Hannibal, 1. c, same type locality. Named in honor of Dr. C. 

 A. White. 



2693 Valvata Utahensis Call. 



2694 Bathytoma Tremperiana 



Dall, Nautilus 24:109, named in honor of Dr. Tremper. 



Shell averages about 62 mm. long, proportionately much heav- 

 ier than B: Carpenteriana, and fasciole more strongly constricted, 

 the appressed margin of whorl does not approach as closely to the 

 periphery of preceding whorl; periphery often marked by a mi- 

 nutely beaded or undulate thread, and more nearly midway be- 

 tween sutures on the spire; aperture shorter than spire; aper- 

 ture 32.1, spire 32.2, spire 32.2, diam. 20.7 mm. Dall suggests 

 the differences may be sexual between this and Carpenteriana. 



Santa Cruz, Cal., to Cerros Island, in 29-822 fms. 



2695 Bathytoma Carpenteriana 



Dall gives the measurements of this as 90-111 mm. long, aper- 

 ture 34.6, spire 29.4, diam. 22.6 mm., and considers B: Tryoniana 

 as merely a var. Tomales bay, Cal., to Cerros Island, Baja Cal. 



2696 Modiolus Diegensis 



"Shell small, zoned with dark blue, umbones usually white, 

 covered with an olivaceous brown periostracum; anterior end very 

 short, rounded, with 2 or 3 radial grooves externally; umbones 

 moderately prominent; dorsal profile ascending, nearly straight, 

 subangulate behind, the margin carried with a broad sweep to 

 the base, where it meets the posterior end of an obscure ridge ra- 

 diating from the umbones, in front of which the valves are more 

 or less constricted, and, on the base, flattened, giving a slightly 

 arcuate aspect to the shell; valves with a very slight rather ante- 

 rior gape; interior polished, dark blue, much as in Mytilus edulis, 

 the ligament long, the anterior margin with 3 or 4 crenulations 

 corresponding to the external radial grooves. Length 19, max. 

 height 6.5, diam. 4.5, umbones behind the anterior end of shell 

 1 mm." — Dall, Nautilus 24:110. 



Type locality: — San Diego, Cal. (Gripp). May possibly be 

 referrable to the genus Myrina. 



2697 Mitra Belcheri Swainson. 

 Magdalena bay, Baja Cal. 



