252 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 



Terebra (Strioterebrum) balaenorum Dall, n. sp. 



Sliell small, slender, acute, ■whitish flesh-color, with occasional brown flecks, or 

 all pale brown, with about fifteen whorls, of which the apical three are glassy, 

 smooth, and brownish; subsequent whorls flattish, with a well-marked nodulous 

 presutural baud and impressed sulcus ; the nodules are subrectangular, correspond- 

 ing to the axial ribs, which are feeble, moderately retractively arcuate and about 

 seventeen in number on the penultimate whorl ; in front of the baud are six or 

 seven flattish straplike or threadlike spiral little-elevated ridges, irregular in width 

 with narrower interspaces and obscure very fine spiral striation visible on top of 

 the ridges here and there, the base being similarly sculptured with rather narrower 

 ridges ; all the ridges are slightly nodulous or wavy when interrupted by the ribs; 

 aperture elongate, lozenge-shaped, the outer lip thin, inner lip poHshed but not 

 callous, pillar hardly keeled ; canal reduced to a notch, siphonal fasciole with a 

 sharp posterior keel. Lou. of shell, 27.0; of last whorl, 10.5 ; of aperture, 7.0; 

 max. diam., 6.0 mm. 



IJ. S. S. " Albatross," station 2835, off Ballenas Bay, west coast of Lower 

 California, in five and a half fathoms, mud. U. S. N. Mus. 110,599 ; also at La 

 Paz, Gulf of California, by W. J. Fisher. 



This species is somewhat like Reeve's figure of Terebra serotina Adams and 

 Reeve, from Japan, whicli, however, is a larger species, has a double band of 

 nodules and a callous inner lip. 



Terebra (Strioterebrum) lucana, Dall, n. sp. 



Shell small, straw-colored, acute, with about fourteen whorls, the apex blunt 

 and slightly swollen and, with the following whorl, glassy, smooth, and polished ; 

 subsequent whorls flat, regularly increasing, with a rather wide, closely vertically 

 ribbed presutural band, which is also closely spirally evenly tlireaded with about 

 five threads ; the sulcus is marked by a series of rather deep punctations between 

 the raised axial sculpture; body of the penultimate whorl with about thirty-two 

 similar narrow, low, nearly vertical, wave-like ribs which are also prolonged 

 across the band and are separated by rather wider interspaces ; these arc crossed 

 between the sulcus and the next preceding suture by about a dozen even, nearly 

 uniform and uniformly spaced spiral threads with narrower interspaces which 

 have an almost punctate appearance from the fine reticulation ; similar threads 

 and the anterior prolongations of the ribs cover the base ; aperture narrow, rather 

 long; outer lip simple, inner lip slightly glazed; pillar with two distinct rounded 

 plaits; canal distinct; fasciole lamcllose with a strong posterior keel. Lon. of 

 shell, 36; of last whorl, 14; of aperture, 9 ; max. diam., 7 mm. 



U. S. S. " Albatross," station 2S30, west of the soulliorn extreme of Lower 

 California, in 66 fathoms, sand, bottom temperature 74° F. U. S. N. Mus. 96,567. 



This species is nearest to T. hindsii Deshaycs (not Carpenter) from China, but 

 is more regularly conical and acute, the whorls flatter with a relatively wider 



