350 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 



white, -vrith 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, obUque, hardly angulale by the umbihcal 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° U' 

 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°.G F. Also at station 2992, off Clarion Island, in 460 fathoms, sand, 

 temperature 41°.8, and off the Santa Barbara Islands in 414 fathoms at station 

 2839, temperature 41°.4. Type, U. S. N. Mas. 122,550. 



The operculum is thin, pale yellow and multi-spiral. The shell is remarkable 

 on account of its total absence of ornament. 



Solariella ceratophora Dall. 



Plate 3, figure 3. 

 Solariella ceratophora Dall, Proc. U. S. Nat. Mua., 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. 24 mm. 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 37°.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, probal)ly of this species, 

 were dredged at station 3431, off Mazatlau, Mexico, iu 995 fathoms, mud, temper- 

 ature 37«> F. 



Solariella galapagana Dall n. sp. 



Plate 4, flg^ure 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 pcriplicry, and two faint threads between the shoulder and the preceding 



