MONODONTA. 101 



sometimes traversed by an elevated line. The umbilicus is pretty 

 narrow, almost circular, bounded by an obtuse angulation. The 

 aperture is circular inside and appears narrow because the shell is 

 very thick ; the throat is completely smooth ; the columella is arcuate 

 at base, separated by a notch from the outer lip, and with two or 

 three denticles there, above continued in a lobe which partly sur- 

 rounds the umbilicus. The color is blackish-brown, the decorticated 

 apex reddish-brown. 



Oblique alt. 9, diam. 12 mill. (PhlUpjn.) 



Habitat unknoivn. 



From T. scabriculus v. d. Busch, this species is separated by the 

 thick shell, rapidly widening whorls, the rounded, not angular periph- 

 ery, etc. (Phil.) 



T. leprosus Phil., Zeitschr. f. Mai, 1851 ; Conchyl. Cab., p. 828, t. 

 46, f. 13. 



Ma}' be a young shell. Known to me only by Philippi's descrip- 

 tion translated above. 



M. RADULA (Parreyss) Philippi. PI. 22, figs. 51, 52. 



Shell globose-conic, imperforate, small, thick and solid, lilackish, 

 unicolored ; spire elevated or rather depressed, conical ; apex acute, 

 flesh colored ; whorls 5, slightly convex ; spirally encircled by 

 regularly granose subequal lirse, about 6 in number on the penul- 

 timate, 11 to 13 on the last whorl ; body-whorl globose, convex be- 

 low, periphery rounded ; aperture rounded ; outer lijj slightly 

 crenated by the spiral ribs, dark-margined, beveled to an edge, 

 thickened by a heavy white rim inside, which is slightly notched at 

 the periphery, but elsewhere is smooth ; columella oblique, straight- 

 ened, not obviously dentate. 



Alt. 7, diam. 6 ; alt. 5^, diam. 62 mill. 



Sancluich {?) and Fiji Is. 



Trochu--^ radula Parr, in Philippi, Zeitschr. f. Mai., 1848, p. 124. 

 — Conchyl. Cab., p. 204, t. 30, f 9.— Fischer, Coq. Viv., p. 278. t. 

 91, f 3. ' 



Allied to M. lugubris, but perfectly distinct in the small globose, 

 evenly gi'anulose character of the shell. Numerous specimens are 

 before me from the Fiji Is., from J. W. Mighels. 



M. suBROSTRATA Gray. PI. 19, figs. 89, 90. 



Shell conical, suborbicular, solid, black, with close wavy longitu- 

 dinal yellow lines ; spire short ; w^iorls 5, last large, rounded, hinder 



