92 PROCEEDINGS OF THE NATIONAL MUSEUM vol.70 



Family TURRITELLIDAE 



Genus TURRITELLOPSIS G. O. Sars 



TURRITELLOPSIS FLORIDANA, new species 



Shell minute, white, slender, with a smooth obliquely set nucleus 

 of a whorl and a half and 8 well-rounded subsequent whorls; suture 

 distinct, appressed; a space in front of the suture is smooth, beyond 

 it are (on the early whorls 2, later 3, and on the last whorl 4) small 

 simple equal and equally distributed threads with wider interspaces; 

 tne rounded base is smooth; axial sculpture of faint incremental 

 lines and occasional indications of resting stages on the spire; base 

 imperforate, aperture ovate, the outer lip thin, sharp, crenulated by 

 the sculpture. Length, 2.6; diameter, 1 mm. U. S. Nat. Mus. 

 Cat. No. 323856. 



Off Fernandina, one specimen. Gulf of Mexico, off Cape San Bias, 

 in 169 fathoms, at United States Bureau of Fisheries Station 2400; 

 one specimen (type). 



This is almost a replica in miniature of T. acicula Stimpson, but 

 is more cylindrical and more regularly sculptured. 



Family TRIPHORIDAE 

 Genus TRIPHORA Blainville 



No species of typical Triphora occurs in the collection, but the 

 genus is represented by numerous specimens belonging to two subgen- 

 era. These specimens however are rarely in perfect condition, most 

 of them are more or less stained with manganese oxide and not over 1 

 in 100 retains the complete adult aperture. It is a curious fact that 

 nevertheless in nearly half the individuals the smooth frail swollen 

 protoconch is well preserved. Many of the specimens have the 

 sculpture worn, which often greatly alters its appearance. Quite a 

 number have been drilled by some carnivorous gastropod, which one 

 would think must have been poorly repaid for its labor. All the 

 species present the well defined aspect of deep sea forms. 



Subgenus BiFORlNA Bucquoy, Dautzenberg, and Dollfus 



TRIPHORA (BIFORINA) CARACCA, new species 



Shell small, with 3 brown nuclear and 16 or more subsequent 

 whitish whorls; form acute conical with flattish sides; suture 

 obscure but its situation emphasized by the adjacent beaded cords; 

 spiral sculpture of 2 strong prominently beaded cords with a small 

 slightly undulated simple thread between them; there are also ex- 

 tremely fine close striae over the surface, onlj'' visible under magnifi- 

 cation; on the anterior cord of ths sixteenth whorl there are 17 

 beads; the base of the immature shell has a thin but rounded 



