268 bulletin: museum of comparative zoology. 



Gemmula eldorana Dall, n. sp. 



Plate 14, figure 8. 



Shell small, solid, chalky with an olivaceous periostracum, decollate Trith about 

 four and a half reniaiuiag wiiorls ; suture obscure, with a narrow slightly elevated 

 band in front of it, and on the last whorl a gradually developing similar band 

 behind it ; in front of tlie first band is a depression with two or three incised 

 spiral lines, followed by a strong nodulous keel corresponding to the anal fasciole, 

 in front of which again are (on the spire one, on the last whorl four) strong, 

 simple, distant, spiral threads, of which the second is strongest and followed by 

 the widest interval, the series preceded by eight or ten smaller, closer, simple, 

 spiral threads which extend to the end of the canal ; axial sculpture of incre- 

 mental lines and on the earlier whorls obscure wrinkles connected with the 

 nodules on the keel, which number on the penultimate whorl about twenty-four and 

 on the last whorl become obsolescent; aperture short, lunate; outer lip sharp, 

 with a well marked sulcus at the principal keel ; body with the sculpture 

 erased ; pillar very short, twisted, obliquely truncate in front ; axis not pervious ; 

 canal short, recurved, with flaring edges. Lon. of three wlioi-ls, 8 ; of last 

 whorl, 6; of aperture, 4; max. diam. 5 mm. Operculum small, narrow, pale 

 brown, nucleus apical. 



U. S. S. "Albatross," station 3392, Gulf of Panama, in 1270 fathoms, hard 

 bottom, temperature 36°. 4 F. U. S. N. Mus. 123,120. Also at station 2807, 

 near the Galapagos Islands, in 812 fathoms, ooze, temperature 38°. 4. 



Another species of the same group but with distinctive sculpture. 



Gemmula vicella Dali,, n. sp. 



Plate 14, figure 5. 



Shell small, stout, subturrited, the nuclear whorls eroded, the spire longer than 

 the aperture, with about six whorls in addition to the nucleus ; white with a gray, 

 olivaceous periostracum, the aspect much like a stumpy Bela ; suture distinct, 

 not appressed, wliorl in front of it slightly constricted, sloping to a prominent 

 keel at the shoulder; this slope is apparently coincident with tlie anal fasciole and 

 is sculptured only by curved lines of growth and faint indications of axial ribs, 

 wliich become more prominent in front of the shoulder, are stronger on the 

 earlier whorls and number about fifteen on the penultimate whorl ; these ril)s arc 

 feeble, with wider interspaces, rounded, and protractive, becoming obsolete on 

 the base and most of the last whorl ; spiral sculpture strongest in the shoulder 

 keel, which is a little nodulous where it crosses the ribs ; in front of it are tlirce 

 to five spiral threads (on tlie spire) of which the second is strongest and faintly 

 nodulous, the others feebler, more adjacent and simple ; these become more 

 numerous by intercalation, the last wliorl having about sixteen between the keel 

 and the end of the caual ; tlie lines of growth arc rather strong and give the 



