30 PKOCEEDINGS OF THE NATIONAL MUSEUM vol.70 



on the earlier whorls of an obscure shoulder in front of the fasciole, 

 and over the whole shell fine even spiral striae, with flattish wider 

 interspaces which on the canal become threadlike; aperture rather 

 narrow, pillar straight, attenuated in front, outer lip thin and arcuate. 

 Length, 5.6; diameter, 2.5 mm. U. S. Nat. Mus. Cat. No. 1083100. 

 Three specimens, off Georgia. 



PLEUROTOMELLA? CORRIDA, new species 



Shell minute, white, with a small Sinusigera nucleus of three, and 

 four and a half subsequent well rounded whorls, suture appressed and 

 constricted; anal sulcus deep, the fasciole narrow and close to the 

 suture; axial sculpture of 11 prominent rounded ribs with wider inter- 

 spaces, crossing the whorls from the fasciole nearly to the pillar; spi- 

 ral sculpture of 4 or 5 fine, sharp threads with wide interspaces, a little 

 swollen where they cross the ribs, and finer threadlets in the inter- 

 spaces and on the base; base well rounded, pillar short, straight, 

 gyrate with pervious axis; canal short; outer lip arcuately produced, 

 thin, sharp. Length, 4.7; diameter, 2.0 mm. U. S. Nat. Mus. Cat. 

 No. 107947. 



Two specimens off Fernandina and one off Georgia. 



PLEUROTOMELLA? (EUCYCLOTOMA) APERTA, new species 



Shell small (immature) , white, thin, with a brown Sinusigera nucleus 

 of three and two subsequent rapidly enlarging whorls; suture distinct, 

 not appressed; anal sulcus wide and shallow, the fasciole flattish, 

 with arcuate axial sculpture; spiral sculpture on the first normal 

 whorl of a prominent peripheral keel and a second which is covered 

 by the suture; on the second whorl there are two such crenulate 

 keels one on each side of the periphery, with a wide interspace and 

 and three less prominent on the base; axial sculpture of incremental 

 lines which are periodically stronger; there are also half a dozen fine 

 threads on the canal; base only moderately rounded, canal short, 

 wide; pillar straight, attenuated anteriorly, gyrate, with a pervious 

 axis; outer lip thin, the aperture very wide. Length, 4.5; diameter, 

 2.8 mm. U. S. Nat. Mus. Cat. No. 108306, 



One specimen off Georgia. 



Though doubtless immature the characters of the species are so 

 emphatic that it can not fail to be identified. 



EUBELA LIMACINA Dall 



Pleurotoma (Bela) limacina'D ai,l,, Bull. Mus. Comp. Zool., vol. 9, p. 55, Aug. 



1881. 

 Daphnella limacina Dall, Bull. Mus. Comp. Zool.. vol. 9, p. 102, Oct., 1881. 

 Pleurotoma {Dejrancia) hormophora Watson, Linn. Soc. Journ., vol. 15, p. 



457, Nov. 3, 1881. 

 Clathurella hormophora Watson, Challenger Gastropods, p. 351, pi. 21, fig. 



9, 1885. 



