220 PROCEEDINGS OF THE ACADEMY OF 



normal whorls 7, tabulate above, convex, last one produced into a 

 short open slightly recurved canal ; longitudinally ribbed, ribs 

 small, compressed, rounded, slightly oblique, 13-14 on the body 

 whorl, crossed by small, revolving elevated lines, forming granules 

 where they intersect the ril)3 ; aperture oblong, sub-rhomboid ; 

 posterior sinus very deep, ovate ; peristome strongly varicose 

 externally, rather acute, crenulate, and abbreviatel}' lyrate within ; 

 columella faintl}' rugose with oblique wrinkles, nearlj' vertical, 

 and together with the parietal region thinly callous. 



Length 8 mill. 



Hab. Yiti Isles. (Coll. Garrett.) 



A very rare and beautiful species found on the outer reefs. 



Clathurella c^lata, Garr., pi. 2, fig. 34. 



Shell small, oblong, fusiform, rapidly tapering towards the base, 

 spire moderately elevated, apex acute ; whorls embryonal 2, brown, 

 normal whorls 6, rounded, last one produced into a short, slightly 

 recurved canal; longitudinally nodosel}- ribbed, 10 on the body 

 whorl, crossed by smaller revolving ridges, 3 on the penidtimate 

 whorls, 10-11 on the body, interstices scabrous with close, elevated 

 longitudinal stria}; suture deepl}' impressed; a])erture oblong, 

 narrow, sides nearl^'^ parallel, half the length of the shell ; pos- 

 terior sinus large, rounded ; peristome trenchant, obsoletely crenu- 

 late, with 5 stout teeth on its inner edge ; columella nearly verti- 

 cal, smooth ; color cinereous, stained with luteous, nodules whitish 

 and obsoletely lineated in the spiral grooves. 



Lensfth 6 mill. 



Hah. Yiti Isles. (Coll. Garrett.) 



A rare and beautifully sculptured species of which we found 

 two living specimens on tlie outer reefs. 



Clathurella infrasulcata, Garr., pi. 2, fig. 35. 



Shell solid, oblong, turroted, spire rather long, yellowish-gray ; 

 whorls 6-7, convex, roundl}' shouldered above, longitudinally 

 ribbed ; ribs rounded, 10 on the bod}' whorl, crossed b}' closely-set 

 small transverse ridges ; base obliquel}' sulcate, the grooves crossed 

 by the longitudinal ribs; canal short, broad truncate; aperture 

 oblong, sub-rhomboid, nearly one-third the length of the shell ; 

 peristome with a stout external rib, al)breviately lyrate along the 

 inner edge; posterior sinus large, deeper than broad; columella 

 smooth. 



