CLASS GASTROPODA 
27 
nucleus being sinistral and sunken; when fresh, the shell is of a translucent 
pinkish white, the thicker parts near the suture are more opaque and give 
the effect of a white band in front of the suture; the general form 
resembles that of A. (M) curt ulus, though the shell, with the same number 
of whorls, is much larger, the spire less evenly dome-like, and the nucleus 
more sunken; suture very distinct, almost channeled; sculpture of fine, 
close-set, minutely punctate spiral lines, hardly visible without a lens; 
aperture with a well-marked anterior sulcus or canal; anterior plait on 
the pillar strong, prominent, the posterior plait weaker, and ending further 
within the aperture, but quite distinct. A very thin wash of callus on the 
body; outer lip thin, simple. Alt., 5.5; diam., 3.7; spire above the last 
whorl, 1.0 mm. (Dali.) 
Type in United States National Museum. Type locality, U.S.S. 
“Albatross” Station 3194, off Estero Bay, California, in 92 fathoms. 
Range. Straits of Juan de Fuca to Gulf of California. 
Family ACTEOCINIDAE 
Genus ACTEOCINA Gray, 1847 (Tornatina) 
Shell cylindrical or fusiform, involute, covered with an epidermis; 
spire distinct, produced, apex mamillated, suture canaliculated; aperture 
narrow, linear; inner lip callous, furnished at the fore part with a single 
plait; outer lip straight, simple. (A. Adams.) 
Type. Tornatina voluta Quoy and Gainard. 
Distribution. West Indies, United States, Mediterranean, Philip¬ 
pines, China, Australia; on sandy bottoms, ranging to 35 fathoms. Fossil: 
Tertiary. 
This is the genus Tornatina of A. Adams, and I have used his descrip¬ 
tion. 
Acteocina culcitella Gould, 1852 
Plate 2, figs, la, b, c 
Boston Journal of Natural History, 6:377; PI. 14, fig. 8. 
Shell ovoid-cylindrical, rather solid, bluish-white, covered by a rough 
straw-colored epidermis; whorls five, the anterior one elongated, somewhat 
fusiform, rounded anteriorly, sculptured with fine, close-set, revolving 
striae, more distinctly indicated when the epidermis is present; the four 
posterior whorls form a conical spire, having a suture so profound that 
they seem invaginated and quite detached from each other. Aperture 
[27] 
