48 BULLETIN 68, UNITED STATES NATIONAL MUSEUM. 



TURBONILLA (STRIOTURBONILLA) STYLINA Carpenter. 

 Plate 8, figg. 7, 7«. 



Chemnitzia {/tonjuata var.) stylina Carpenter, Ann. Mag. Nat. Hist., 3d ser., 

 voL 15, 1865, p. 396. Turbonilla (Strioturbonilla) torquata stylina Dall and 

 Bartsch, Mem. Cal. Acad. Sci., vol. 3, 1903, p. 272, in part. Turbonilla 

 {Strioturbonilla) stylina Dall and Bartsch, Proc. U. S. Nat. Mus., vol. 33, 

 1907, p. 497, pi. 44, figs. 11, 11a. 



Shell slender, subdiaphanous to milk-white. Nuclear whorls two, 

 smooth, depressed, helicoid, scarcely extending beyond the outline of 

 the spire and having their axis at right angles to the axis of the 

 succeeding turns. Post-nuclear whorls well rounded, separated by 

 strongly constricted sutures, rather high, ornamented by rather low, 

 broad, rounded, sinuous, protractive axial ribs, of which there are 16 

 upon the first, 20 upon the fifth, and 2S upon the penultimate turn. 

 Intercostal spaces moderately depressed, about as wide as the ribs, ter- 

 minating a short distance above the sutures, thus leaving a narrow, 

 smooth band between tlie termination of the ribs and the suture as in 

 T. (Strioturhonilla) torquata Gould, but not quite as wide as in that 

 species. Periphery of the last whorl well rounded. Base rather 

 short, well rounded. Entire surface marked by very fine, wavy spiral 

 striations. Aperture subovate, outer lip thin; columella slender, 

 moderately long, slightly twisted, almost vertical. The specimen 

 described and figured (Cat. no. 56429, U.S.N.M.) was collected by 

 Doctor Dall in 8 or 10 fathoms at Monterey, California. It has 11 

 post-nuclear whorls and measures : Length 6.5 mm., diameter 1.7 mm. 

 (not 8 and 1.9 mm., as erroneously stated in the last-cited reference). 

 Another specimen was dredged in 12 fathoms off Del Monte, Monterey, 

 by Mr. S. S. Berry (Cat. no. 165199, U.S.N.M.). Two specimens (Cat. 

 no. 163249, U.S.N.M.), both immature, dredged b^^ the Bureau of 

 Fisheries steamer Albatross at station 2932 in 50 fathoms off Coro- 

 nado Island, are provisionally referred to this form. 



TURBONILLA (STRIOTURBONILLA) CALVINI, new species. 

 Plate 4, figs. J, \it. 



Shell elongate-conic, milk-white. Nuclear whorls two and three- 

 fourths, forming a decidedly elevated helicoid spire, the axis of which 

 is at right angles to that of the succeeding turns, in the first of which 

 they are about one-fourth immersed. Early post-nuclear whorls 

 strongly rounded, decidedly shouldered at the summit, and con- 

 stricted at the sutures. Later ones flattened in the middle, less 

 shouldered and less contracted. Axial ribs strong, sublamellar, 

 shouldered a little below the summit; 14 upon the first to ninth, 16 

 upon the tenth, and IS upon the penultimate turn. Intercostal spaces 

 about two and one-half times as wide as the ribs, well impressed, a 



