MUSEUM OF COMPARATIVE ZOOLOGY. 171 



Fusus ceramidus n. s. 



Shell of a waxen or brownish yeHow color, of a peculiar waxen subtranslu- 

 cency, ninc-whorled, slronj^ly transversely ribbed, with obscure spiral sculp- 

 ture and an imbricated band in front of the suture. Nucleus white, smooth, 

 small but swollen. Transverse sculpture of seven or ci^dit rounded ribs, 

 stouter and more prominent on the early wliorls, and on most of them not 

 quite reaching the suture; also sharpish lines of growth which in front of the 

 suture are elevated into flattish somewhat irregular imbricated scales, forming 

 a narrow band in front of the suture. Spiral sculpture of primary and finer 

 secondary threads, one or two of the former, near the periphery, becoming 

 sharper and more prominent as they pass over the ribs ; on the later whorls 

 all the spiral sculpture has a worn or partially obsolete appearance. Aperture 

 large, canal moderate, curved to the left; outer lip not much thickened, inter- 

 nally lirate ; a callous ridge on the body, near the outer lip; the inner lip 

 smooth, or with a few lirse near the canal. Max. Ion. of shell, 46.5 ; of last 

 whorl, 32.0; of aperture and canal, 26.0; max. lat. of shell, 18.7 mm. 



Habitat. Stations 272, 27.3, and 290, at Barbados, in 73-103 fms., sand, 

 bottom temperature 60° to 7l°.0 F. 



This is a peculiar species and easily recognized by the color and imbricated 

 band before the suture. 



Fusus amphiurgus n. s. 



Shell small, eight-whorled , yellowish, translucent, with spiral touches of 

 reddish brown; nucleus polished, smooth, brownish, two-whorled; transverse 

 sculpture of fine sharp distinct incremental lines, and 9-10 narrow rounded 

 subequal ribs, with wider interspaces, and somewhat broader anteriorly than 

 near the suture; spiral sculpture of, on the periphery, two primary threads 

 stronger than any of the others, swollen, keeled, and opaque white where they 

 pass over the ribs; between these and the suture behind are three or four 

 smaller threads with touches of browTi in the interspaces; in front of the 

 periphery and between it and the canal are about six more smaller primary 

 threads, and others which cover the canal ; between these on the whorl are 

 from one to four extremely fine secondary threads. Owing to the difference 

 in the size of the primaries the upper surface of the whorls slopes, roof-like, to 

 the periphery, and this, with the white noduled peripheral threads, is the most 

 striking feature of the shell; the aperture is rounded, the outer lip internally 

 lirate, the canal slender and well differentiated. Max. Ion, of shell, 14.0; of 

 last whorl, 9.0; of aperture and canal, 7.3; max. lat. of shell, 6.5 mm. 



Habitat. Gulf of Mexico, at Station 45, in 101 fms., bottom temperature 

 62° F. 



This little shell is immature, and is described with some hesitation for that 

 reason, yet it does not show characters like those exhibited by the young of 



