194 MARINE SHELLS OF WEST COAST OF NORTH AMERICA 
spire, as the outer lip runs just above the peripheral thread; the radial 
sculpture comprises incremental lines, and on the last whorl about twenty 
low narrow somewhat oblique riblets about a millimeter apart, extending 
from the suture to the first peripheral keel, but not beyond; these riblets 
nodulatc the weak spiral, but are only about half as numerous as the 
nodules on the peripheral spirals; suture distinct, not channeled; base 
rounded; the umbilicus funicular, of moderate size, bounded by an incon¬ 
spicuous keel, above which the walls are vertically striated; margins of 
the aperture simple, sharp, the upper lip advancing where it joins the 
body; pillar lip thin, slightly excavated, the distal angle not prominent. 
Alt., 9.0; max. diam., 13.5 mm. (Dali.) 
Type in United States National Museum, No. 109020. Type locality, 
U.S.S. “Albatross” Station 3342, off the Queen Charlotte Islands, in 1,588 
fathoms, ooze, bottom temperature 36?3 F. 
Range. Known only from type locality. 
Described as Solariella carlotta Dali. 
Cidarina ceratophora Dali, 1895 
Proceedings of the United States National Museum, 18:9. Bulletin, Museum of Com¬ 
parative Zoology, 43:350; PI. 3, fig. 2. 
Shell thin, with a pale olive, silky epidermis, and six whorls besides the 
(decollate) nucleus; early whorls smooth, gradually taking on two rows 
of projecting points or sharp nodules, which are, on the later whorls, 
connected by a slender spiral thread; periphery with a slender granular 
thread, on which the suture is laid; base with five similar threads, closer 
as they approach the umbilicus; umbilicus small, vertically striate; aper¬ 
ture rounded, slightly angulated by the sculpture; the outer lip thin, sharp; 
inner reflected over part of the umbilicus. Height, 28; diameter, 24 mm. 
(Dali.) 
Type in United States National Museum, No. 122960. Type locality, 
U.S. Fish Commission Station 3432, in 1,421 fathoms, off La Paz, Gulf 
of California. 
Range. San Diego, California, to Mazatlan, Mexico, in deep water. 
Described as Solariella ceratophora. 
Cidarina equatorialis Dali, 1908 
Bulletin, Museum of Comparative Zoology, 43:351; PL 5, fig. 11. 
Shell thin, pearly, the nacre shining through the translucent outer coat¬ 
ing, and a pale yellowish, axially striated, silky periostracum; whorls six, 
exclusive of the (lost) nucleus; suture distinct, not channeled; whorl in 
[7961 
