1918 | Packard: Molluscan Fauna from San Francisco Bay 291 
Occurrence.—At station D 5789 (50) and questionably at D 5788 
(As DBO (Gye 
As far as is known this mollusk has not been reported from San 
Francisco. It was taken by the Survey only in the vicinity of the 
Farallon Islands. It ranges in depth from 33 to 68 fathoms. Living 
specimens were the most abundant at station D 5789 where they were 
associated with Cadulus fusiformis. 
Range.—Strait of Juan de Fuca, Washington, to Santa Barbara, 
California (Cooper). 
SIPHONODENTALIIDAE 
Cadulus Philippi 
Cadulus fusiformis Pilsbry and Sharp 
Cadulus fusiformis Pilsbry and Sharp (1897-1898), p. 193. 
Description.—This species was originally described as follows: 
“*Shell but little curved, long and slender, the greatest diameter contained 
about 9 times in the length of the shell; swelling hardly perceptible, the tube 
very gradually enlarging from the small apex to the beginning of the last third 
of the length, thence an equal size is maintained almost to the aperture, just 
before which it is gently but quite perceptibly contracted on all sides. Surface 
smooth and glossy, bluish-white, scarcely translucent, with oblique rings of 
more opaque white, and near the apex some longitudinal white lines; a pellucid 
ring bordering the lip-edge, behind which there is a short opaque white tract, 
passing gradually into the bluish and banded general color. Tube a mere trifle 
compressed vertically at the widest part. Aperture oblique, and (measured 
obliquely) a trifle longer than wide (in the ratio of 35-33); lip thin, sharp. 
Anal orifice circular and simple.’’ 
Length, 4 to 10 mm. 
Occurrence —At stations D 5785 (13), D 5786* (74), D 5788 (16), 
and D 5789 (104). 
Living specimens of this species were dredged in 40 to 68 fathoms 
from a bottom composed of fine dark green sand. 
Range.—Puget Sound to San Pedro, California. 
AMPHINEURA* 
LEPIDOPLEURIDAE 
Lepidopleurus Risso 
Lepidopleurus farallonis Dall 
Lepidopleurus farallonis Dall (1902b), p. 257. 
Description.—This chiton was originally described by Dall (1902b) as follows: 
“*Chiton small, thin, wide, with a low rounded back and yellowish-white 
color; girdle narrow, sparsely spiculose, with very short, fine bristly spicules; 
jugum hardly defined, with no obvious mucro; lateral areas slightly elevated 
* For the most revent revision of this group see Berry, 8. S., Notes on West 
American chitons. Proce. Calif. Acad. Sci. [4], 7. op. 229-248, 4 text figs. 1917. 
