y0 im U '] PROCEEDINGS OF THE NATIONAL MUSEUM. 30£ 



whorls, with indications of a shoulder or carina on the three whorls 

 following the nucleus; suture slightly irregular, appressed, distinct, 

 not channeled; spiral sculpture of fine threads, alternately larger and 

 smaller, pretty uniform over the whole surface, with narrower inter- 

 spaces, this sculpture fainter on the sutural side of the fasciole; trans- 

 verse sculpture of faint, irregular, sharp edged plications, strongest 

 near the suture and on the obscure angle just in front of the fasciole, 

 elsewhere nearly obsolete; fasciole very slightly impressed; notch very 

 shallow ; aperture long, narrow, pointed behind ; outer lip sharp, arched 

 forward; canal distinct, wide; pillar rosy, attenuated in front; axis 

 almost pervious; body with a thin glaze over a slightly excavated 

 space; nucleus lost; soft parts of the subgenus ; maximum longitude 

 of shell, 31.5; maximum latitude, 11.5 mm . 



Hab. — Station 2807, near the Galapagos Islands, Pacific Ocean, in 

 812 fathoms, mud; temperature 38°.4 F. 



This species, though more slender and much more finely striated, 

 recalls the slender varieties of P. Agassizii, though altogether destitute 

 of the strong ribbing and sutural plications. None of the P. Agassizii 

 have quite such a taper spire, yet in a general way the two forms be- 

 long to the same section of the group. Only one living specimen of 

 the P. suffusa was obtained. 



Subgenus GLYPHOSTOMA Gabb. 



Glyphostoma gratula Dall. 



G. gratula Dall (1881), op. tit., xvm, p. 110, PI. xn, Fig. 10. 

 Pleurotoma (Drillia) incilis Watson. 



Collected by the Albatross at Station 2750, off St. Bartholomew, West 

 Indies, iu 496 fathoms, sand; temperature 44°.4 F. 



Genus BORSONIA Bellardi. 



Subgenus CORDIERIA Rouault. 



A finely spirally striate, white Cordieria, with two plaits, an undulated 

 anterior border to the anal fasciole, the canal long and slender, with a 

 constriction in front of the short body whorl, was collected with the 

 preceding. The last whorl measured 17.5 by 5.5 mm . The spire was en- 

 tirely deficient, so that it can not be described, though the occurrence 

 of the species is worth noting. 



Superfamily EHACHIGLOSSA. 



Family OLIVID^E. 



Genus OLIVELLA Swaiuson. 



Olivella floralia Duclos. 



Collected at Station 2758, 90 miles southeast from Cape San Koque, 

 Brazil, in 20 fathoms. 



