350 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 
white, with a pink or blue nacre glowing through; whorls rounded, flattened in 
front of the suture; base rounded; umbilical margin keeled; umbilicus wide, 
funicular ; aperture rounded, oblique, hardly angulate by the umbilical rib, and 
with a very short interruption between the inner and outer lips; operculum light 
brown, thin, with about ten whorls. Height, 15; major diam. 19; minor 
diam. 15.5 mm. 
U.S. S. “Albatross,” stations 2928 (in Lat. 32° 47’ N.); 3187 (Lat. 36° 14’ 
'N.); and 3348 (Lat. 39° 03’ N.) off the coast of California, in 417, 298, and 
455 fathoms, respectively on sandy or muddy bottom, temperature ranging from 
41° to 47°.6 F. Also at station 2992, off Clarion Island, in 460 fathoms, sand, 
temperature 41°8, and off the Santa Barbara Islands im 414 fathoms at station 
9839, temperature 41°.4. Type, U. S. N. Mus. 122,580. 
The operculum is thin, pale yellow and multi-spiral. The shell is remarkable 
on account of its total absence of ornament. 
Solariella ceratophora Datu. 
Plate 3, figure 2. 
Solariella ceratophora Dall, Proc. U. S. Nat. Mus., 1896, 18, p. 9. 
Shell thin, with a pale olive, silky epidermis, and six whorls beside the (decol- 
late) 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; um- 
bilicus small, vertically striate; aperture rounded, slightly angulated by the 
sculpture ; the outer lip thin, sharp; the inner reflected over part of the umbili- 
cus. Height, 28; diam. 24mm. The operculum has four or five whorls. 
U. S. S. “ Albatross,” station 3432 in the Gulf of California, off La Paz, 
Mexico, in 1,421 fathoms, mud, bottom temperature 379.8 F. U.S. N. Mus. 
122,960. | 
The single specimen obtained has repaired an injury of the base so as to some- 
what distort the umbilical region. Except for the presence of an umbilicus this 
might well be referred to Turcicula. A few fragments, probably of this species, 
were dredged at station 3431, off Mazatlan, Mexico, in 995 fathoms, mud, temper- 
ature 37° F. 
Solariella galapagana Datu n. sp. 
Plate 4, figure 2. 
Shell turbinate, thin, creamy white with a fine greenish nacre showing through, 
with a globular large smooth nucleus and four and a quarter subsequent whorls ; 
first nepionic whorl with two sharp spiral keels, one at the shoulder and one at 
the periphery, and two faint threads between the shoulder and the preceding 
