346 University of California Publications in Zoology — [Vou. 14 
Volvula A. Adams 
Volvula cylindrica Carpenter 
Plate 41, figures 7a and 7b 
Volvula cylindrica Carpenter (1863), p. 647; Arnold, R. (1903), p. 191, 
pl. 4, fig. 2. 
Description.—Arnold (1903) deseribed this species as follows: 
“*Shell small, cylindrical; flattened in middle and with margin almost 
parallel, swelling out anteriorly; suddenly narrowed behind, running out into 
short, narrow, umbilicated point; aperture length of shell; very narrow pos- 
teriorly, gradually broadening into subovate opening at anterior end; surface 
smooth, except for faint lines of growth parallel to margin of shell.’’ 
Height, 3 to 9 mm. 
Occurrence—At stations D 5785 (3), D 5786 (1, 1), D 5788 (15), 
IDSs) (ZA) 
This also is a southern species not before reported this far north. 
Associated with the preceding species. 
Range—San Francisco to San Diego, California. 
GADINIIADAE 
Gadinia Gray 
Gadinia reticulata (Sowerby) 
Mouretia reticulata Sowerby (1835), p. 6. 
Rowellia radiata Carpenter, Cooper (1870b), p. 319. 
Gadinia recticulata, Dall (1870), p. 11, pl. 2, figs. 1-9, pl. 4, figs. 1, 2, and 
3; Arnold, R. (1903), p. 197. 
Description.—This species was described by Arnold (1903) as follows: 
“*Shell conical; apex central, smooth, blunt; surface sculptured by numerous 
rounded, radiating ridges, made somewhat nodose by concentric, elevated lines 
of growth; aperture slightly ovate; inner surface smooth; lip smooth, effuse; 
color white.’’ 
This species has been found within this region only by Cooper 
(1871). 
Range.—Farallon Islands (Cooper), Lower California (Carpenter). 
