No. 1610. NEW PACIFIC COAST MOLLUSKS—DALL. 253 
Genus EULIMA Risso. 
? EULIMA LOMANA, new species. 
Shell slender, acute, flat-sided or nearly so; chalky white, with an 
extremely thin yellowish external coating; nucleus eroded; subse- 
quent whorls very shghtly convex, with an obscure peripheral angle 
on the last whorl, upon which the suture of the advancing whorl is 
closely appressed; surface smooth and polished except for very ob- 
scure and minute spiral lines only visible in good heht with a lens; 
base convexly rounded, imperforate; aperture ovate-quadrate, the 
outer lip simple, thin, gently arcuate; the body bare, the pillar almost 
straight, twisted and with a very obscure prominence like an obso- 
lete plait; an examination of the interior of the upper whorls, how- 
eyer, shows no plication; anterior of aperture gently rounded; there 
are no indications of varices or resting stages on the spire. Height 
of shell, 20.0; of last whorl, 10.0; of aperture, 6.5; maximum diam- 
eter, 7.0 mm. 
~ Type—Cat. No. 110652, U.S.N.M. U.S. Bureau of Fisheries Sta- 
tion 4354, sixteen miles off Point Loma, San Diego, California, in 
about 650 fathoms, mud; bottom temperature about 39° I. 
This is a very peculiar shell, which so combines the aspect of a 
Pyramidellid and a Hudima that I feel uncertain as to its permanent 
place in the system. ‘The nucleus is eroded, but seems to have been 
dextral. The surface recalls that of Amaura rather than Hulima, as 
does the texture of the shell, but this may be due to incipient decay. 
There is no plait on the pillar, but it has an obsolete twist unlike any- 
thing I have noted in typical Hulima. Nevertheless it has the ex- 
ternal form and general characters of the latter genus, to which for 
the present it is provisionally referred. It may eventually prove to be 
a giant Aclis, though all the certainly identified Aclides from deep 
water I have examined have much more rounded whorls and con- 
stricted sutures. A shell called by Locard MJesalia flammifera, from 
the Zalisman expedition, has a similar outline, but has a pronounced 
basal keel and pattern of coloration. 
Genus ODOSTOMIA Fleming. 
ODOSTOMIA (EVALEA) ATOSSA, new species. 
Shell small, bulimiform, bluish white, polished, with four gently 
convex whorls beside a very minute (and somewhat eroded) nucleus 
of about one whorl; suture distinct, not appressed; surface with two 
or three faint spiral threads on the second, four or more on the third, 
becoming obsolete on the last wherl, subequally distributed between 
the sutures; beside these there are numerous extremely fine spiral 
strie only visible under a lens, and which also become obsolete toward 
