96 PROCEEDINGS OF THE NATIOXAL MUSEUM vol.70 



and feebly marked by flexiious incremental lines; the canal is very 

 short, the adult aperture defective. Length, 9; maximum diameter, 

 2 mm. U. S. Nat. Mus. Cat. No. 108081. 



Off Fernandina, eight specimens. 



The obliquity of the whorls and the much inflated protoconch are 

 the most conspicuous features of this species. 



TRIPHORA (STROBILIGERA) COMPSA, new species 



Shell slender, white, conic, the nucleus deficient, with 12 remaining 

 subsequent whorls; suture marked with a fine undulate thread which 

 IS the edge of the base; spiral sculpture of 2 prominent beaded cords, 

 a carina running over the tops of the beads which are not axially 

 paired, the interspaces between the cords forming a series of rounded 

 pits; in front of the suture there is a very small, undulated thread, 

 sometimes doubled; in addition there are microscopic spiral striae 

 over the surface; the immature base is fiattish, with flexuous radiat- 

 ing incremental lines, and a single sharp groove just inside the margin; 

 the base in the adult is less flat, with four spiral flattened cords cover- 

 ing nearly the whole surface; the canal is short, the axis retains a 

 purplish tint, the outer lip is defective. Length, 12; maximum diam- 

 eter, 3.3 mm. U. S. Nat. Mus. Cat. No. 333518. 



Off Georgia, two specimens. 



TRIPHORA (STROBILIGERA) SENTOMA, new species 



Shell elongate, subcylindrical, white, straight sided, the nucleus 

 lost, 17 to 24 whorls remaining but still immature; spiral sculpture 

 of 2 low flattened cords, faintly undulated, one at the periphery of 

 the whorl, the other in front of it, the suture linear with a minute 

 threadlet on each side of it, the interspaces shallow ; axial sculpture 

 of faint incremental lines; immature base flat with flexuous radiating 

 lines and a shallow groove inside the outer edge; canal short. Length, 

 about 28; maximum diameter, 3.5 mm. U. S. Nat. Mus. Cat. No. 

 108072. 



Off Fernandina, two specimens and other fragments. 



One of the fragments has a smooth protoconch of a whorl and a 

 half. The total measurement of length is obtained by piecing to- 

 gether fragmentary specimens. 



There are two or three other species indicated by specimens too 

 imperfect to serve as a basis for formal description. 



Family CERITHIOPSIDAE 



Genus CERITHIOPSIS Forbes and Hanley 



CERITHIOPSIS GEORGIANA, new species 



Shell slender, acute with 4 subcyhndrical smooth nuclear whorls, 

 the last one merging gradually into the adult sculpture, which con- 

 tinues for about 14 moderately rounded whorls; suture distinct, not 



