438 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 40. 



men (Cat. No. 151887, U.S.N.M.) from U. S. S. Albatross station 2547; 

 390 fathoms, 40 miles south of Marthas Vineyard. 



The present species has been listed from the Atlantic coast under 

 the name of Aclis walleri Jeffreys. It is not at all closely related to 

 this form; walleri is much smaller; much more narrowly elongate- 

 conic and has a much wider umbilicus. 



The type of walleri described by Jeffreys * is in the U. S. National 

 Museum (Cat. No. 182214) and measures: Length 3.3 mm., diameter 

 1.2 mm. 



Named for Prof. A. E. Verrill. 



ACLIS CAROLINENSIS, new species. 

 Plate 59, fig. 7. 



Shell acicular. Nuclear whorls two, well rounded, smooth. Early 

 post-nuclear whorls gently rounded on the posterior two-thirds 

 between the sutures and abruptly on the anterior one-third. The 

 later more evenly rounded ; sculptured with numerous fine incremen- 

 tal lines and by feeble, somewhat irregular, raised, slender spiral 

 threads. The combination of the incremental fines and the spiral 

 threads lends the surface of the whorls a somewhat malleated appear- 

 ance. In addition to the above sculpture varical fines appear at 

 irregular intervals. Sutures strongly impressed. Periphery of the 

 last whorl obliquely angled. Base moderately long, strongly but 

 narrowly umbilicated, well rounded, sculptured like the spire with 

 spiral striation, incremental lines and about six obsolete raised spiral 

 threads. Aperture large, decidedly effuse anteriorly, the basal portion 

 patulous; posterior angle obtuse; outer lip thin; columella strongly 

 curved, expanded and revolute. 



The type (Cat. No. 83743, U.S.N.M.) was dredged by the U. S. S. 

 Albatross at station 2595 in 63 fathoms, sandy bottom, bottom tem- 

 perature 75°, 22 miles east-southeast of Hatteras, North Carolina. 

 It has ten whorls, and measures: Length 4.7 mm., diameter 1.3 mm. 



EXPLANATION OF PLATE 59. 



All of the figures are enlarged about 16 times. The measurement cited after each 

 species is the actual length of the specimen. 

 Fig. 1. Aclis dalli; Type, 7.8 mm., p. 435. 



2. Aclis cubana; Type; 4.0 mm., p. 435. 



3. Aclis rushi; Type; 2.7 mm., p. 436. 



4. Aclis bermudensis; Type; 2.1 mm., p. 437. 



5. Aclis Jloridana; Type; 2.9 mm., p. 436. 



6. Aclis verrilli; Type; 4.6 mm., p. 437. 



7. Aclis carolinensis; Type, 4.7 mm., p. 438. 



i British Conchology, vol. 4, pp. 105-6, and figured in vol. 5, pi. 72, fig. 4. 



