CLASS GASTROPODA 
43 
apical depression not carinate, the axis gyrate and widely pervious; outer 
lip arcuate, thin, sharp, rounding into the pillar below; axial sculpture con¬ 
fined to low, narrow, irregular wrinkles, stronger distally; spiral sculpture 
of minute, close-set, slightly wavy striae over the whole surface; the inner 
lip with a thin coating of whitish enamel. Height, 27; diameter, 16 mm. 
(Dali.) 
Type in United States National Museum, No. 216812. Type locality, 
Peavine Pass, Olga, Orcas Island, Washington. 
Range. Olga, Washington, to San Quentin Bay, Lower California. 
Genus CLISTAXIS Cossman 
Some years ago Dr. Jeffreys proposed for a deep-water species the 
name Cryptaxis, which proved to be preoccupied by Lowe in land shells 
and for which Cossman substituted Clistaxis. The shell resembles Cylichna 
( = Bullinella Newton), but has the spire almost concealed. Jeffreys after¬ 
ward referred to this genus a shell, C. crebripunctatus, from the Triton 
dredgings, which has somewhat the form of Scaphander, but with the 
spire, except the apex of the nuclear shell, concealed. Whether this form 
is of the same genus as the original type, C. parvula Jeffreys, seems doubt¬ 
ful, but is too complicated a question to enter upon at this time. A species 
related to C. crebripunctatus, and which appears to be undescribed, was 
collected by F. W. Kelsey, in 50 fathoms off the entrance to San Diego 
Harbor. Two specimens were obtained, showing that the animal is con¬ 
tained within the shell, where it had been allowed to dry. In contracting, 
the test was badly shattered, but showed very strong spiral rows of punc- 
tations. A much smaller specimen was better preserved and affords the 
following notes (Dali) : 
Clistaxis? polystrigma Dali, 1908 
Proceedings of the United States National Museum, 34: 246. 
Shell small, white, barrel-shaped, with the posterior part of the outer 
lip extending slightly beyond the apex of the shell; form much as in 
Harninea solitaria Say; apex sunken, imperforate, the spire concealed; 
outer lip partly membranous and contracting in drying, the shell normally 
covered with a thin periostracum, which in drying splits and contracts; 
sculpture of close, numerous, spiral rows of emphatic punctations, cover¬ 
ing the shell; aperture ample; outer lip thin and submembranous, its 
posterior extremity rounded over evenly to the suture, the anterior part 
not expanded; pillar lip thin, arcuate, the margin reflected, forming a 
gutter just outside the margin; body with little callus, only one whorl 
visible. Length of young shell, 2.8; maximum diameter, 2.2 mm. (Dali.) 
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