MUSEUM OF COMPAliATlVE ZOOLOGY. 1G9 



ribs; between these are numerous small subequal close-set spiral threads ; 

 transverse sculpture of (on the last whorl about 12) ecpial even ribs, which 

 fall away toward the sutures and on the canal; these ribs are wider than their 

 interspaces, with a tendency to become nodidous where crossed by the strong 

 spirals ; both margins of the suture are bordered by a thread and appressed to 

 each other in a wavy line ; canal and aperture moderate ; the outer lip lirate 

 within; inner lip simple, with a light wash of callus; whorls moderately 

 rounded. Max. Ion. of shell, 15.0; of last whorl, 10.0; of aperture, 4.0; of 

 canal in front of the aperture, 4.0 ; max. lat. of shell, 5.5 mm. 



Habitat. Off Cape San Antonio, living, in 1002 fms. Station 5, near Cuba, 

 in 152-229 fms., ooze, temperature 49°.5; off Sand Key, 15-128 fms; off 

 Sombrero, in 54 fms. 



This little shell appears to be abundant, and to have a very wide bathy- 

 metrical range. 



Fusus amiantus n. s. 



Plate XV. Fig. 11. 



Shell pure white, with a straw-colored nucleus, ten-whorled. Spire rather 

 acute, whorls obliquely smoothed off in front of the sutures. Nucleus four- 

 whorled, above smooth, below sculptured with semilunar transverse ripples 

 and a basal carina; spiral sculpture of very fine spiral threads, lightly decus- 

 sated by wavy lines of growth ; there are also two strong threads near the 

 periphery, one lower which is obscured by the suture, and on the last whorl 

 three, more anterior, beside the usual spiral sculpture of the canal; these 

 strong threads become much more prominent, stronger, and sharply keeled, as 

 they pass over the transverse riblets ; transverse sculpture of eight rounded 

 ribs, which appear near the periphery and extend over it on to the base ; they 

 are crossed by the spiral sculpture ; suture appressed, wavy ; the absence of 

 ribs near the suture and the flattening of the shell there give this species a 

 somewhat Pleurotomoid aspect, but there is no notch ; canal moderate, strongly 

 twisted ; aperture smooth within, edges sharp, simple. Max. Ion. of shell, 17.0; 

 of last whorl, 10.3; of aperture and canal, 8.0; max. lat. of shell, 6.6 mm. 



Habitat. Gulf of Mexico, at Station 2, off Havana, in 805 fms., bottom tem- 

 perature 39°. 7 5 F. 



The nucleus of this little shell is peculiar, and the aperture is imperfect, but 

 it is clearly different from any of the known species. There is something in 

 the texture of the shell and the finer sculpture which recalls Sipho ghjptus 

 Verrill. 



Fusus aepynotus n. s. 



Shell small, slender, white, eight-w^horled ; nucleus milk-white, strongly 

 transversely plicate below, above smooth, rounded ; spiral sculpture of (on the 

 last whorl 18) strong rounded threads, of which four or five are visible on the 



