346 University of California Publications in Zoology [Vou.14 
Volvula A. Adams 
Volvula cylindrica Carpenter * 
Plate 41, figures 7a and 7b 
Volwula cylindrica Carpenter (1863), p. 647; Arnold, R. (1903), p. 191, 
pl. 4, fig. 2. 
Description.—Arnold (1903) described 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), 
D 5789 (7). 
This also is a southern species not before reported this far north. 
Associated with the preceding species. 
Range—San Francisco to San Diego, California. 
GADINITADAR 
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). 
the specs fryered 6 Ghiehna alba ; 
tere 13 are UVoloula Ip, 
