V °1889."'] PROCEEDINGS OF THE NATIONAL MUSEUM. 319 



and slightly larger behind ; suture appressed and wavy, conspicuous ; 

 canal stout, slightly twisted, aperture subovate, inargiuated: outer lip 

 internally lirate with two or three strong denticles anteriorly ; inner lip 

 smooth, or slightly granulous. Maximum longitude of shell, 24; of last 

 whorl, 16.5; of aperture and canal, 12.5; maximum latitude of shell, 9 mm . 



Hab.— U. S. Fish Commission Station 2G48, off Cape Florida, in 84 

 fathoms, green mud ; also at Blake Station 3G, in 84 fathoms, Gulf of 

 Mexico; off Sombrero, in 70 fathoms. 



This species recalls F. Bocagei Fischer, dredged by the Travailleur 

 in about 500 fathoms; but that species, from an authentic specimen, is 

 shorter, stouter, with only seven transverse ribs and three principal 

 spiral threads on tlie spire. The fine spirals in F. Bocagei are also more 

 conspicuous. F. cepynotus has a little the aspect of Fusus carolinensis 

 Verrill, especially the young ones, while differing in many details, es- 

 pecially the number and straightness of the ribs. Its nearest relative 

 would seem to be a form named by Borson Fusus lamellosus, from the 

 Tertiary of Modena; but this is merely the young of F. rostratus, and 

 the adult has very different characters. 



Fusus alcimus Dall. 

 Plate vn, Fig. 6. 



Fusus alcimus Dall, Bull. Mus. Comp. Zool., xvin, p. 170, June, 1889. 



Shell resembling F. cepynotus, but shorter and more acute at both 

 ends, with only six much more oblique and proportionally stouter ribs, 

 coarser revolving spirals, and none of the fine spiral striatiou which 

 exists between the primary threads of F. cepynotus. It has eight whorls; 

 the nucleus is strongly plicate below; the interspaces between the ribs 

 are deep, and in them the spirals are much closer together than they 

 are on the summit of the ribs; on the last whorl there is sometimes 

 an intercalary single fine spiral thread. The color is yellowish, with 

 touches of dark brown; the canal is very short; the aperture is con- 

 tracted, the lips much thickened, the outer one strongly internally lirate, 

 the inner one smooth; the suture is inconspicuous and very much waved; 

 maximum longitude of shell, 15 ; of last whorl, 9.2; of aperture and canal, 

 7 ; maximum latitude of shell, 7 ul,a . 



Hab. — Gulf of Mexico, in 95 fathoms, 100 miles north of Yucatan. 



Fusus alcimus var. Rushii Dall. 

 Fusus (alcimus var.?) rushii Dall, op. cit., p. 170, 1889. 



Shell smaller, pure white, nucleus hardly plicate, depressions between 

 the ribs less deep, ribs less prominent and hardly oblique. Longitude 

 8.5 ; latitude, 4 lum . 



Hab. — West of North Bernini, Bahamas, in 200 fathoms; Dr. Kush. 



