456 UMBONIUM. 



generally not more than 4, frequently obsolete ; whorls about 6, 

 each with a prominent, convex margin bordering the dee})ly im- 

 pressed suture, below this margin concave ; last whorl rounded at 

 the periphery, convex beneath ; aperture subquadrate ; basal callus 

 irregularly convex, with two lumps or prominences, one back of the 

 columellar lip. Alt. 12, diam. 19 mill. 



East Indies. 



RoUila suturalis Lam., An, s. Vert, vii, p. 80. — Kiener, Spec, 

 et Icon. Coq. Viv., p. 8, t. 2, f. 3. — Sowerby in Conch. Icon, xx, f. 7. 



Has fewer spiral sulci than U. costatum, and more profoundly 

 impressed suture, with raised margin. 



U. MONiLiFERUM Lamarck. PI. 58, figs. 22, 23, 29, 30, 31. 



Shell depressed, solid, with very low, conoidal spire; color 

 yellow, pinkish or whitish, closely tessellated with purple-brown or 

 bluish slate-color, the basal callus purplish flesh-colored ; surface 

 shining, polished, with spiral sulci above, generally 3-5 in number 

 on the last whorl, often subobsolete ; suture margined by a row of 

 prominent tubercles, 8 to 11 on the last whorl ; whorls about 6, the 

 last rounded at the periphery, cojivex beneath ; callus quite heavy, 

 convex, circular. Alt. 8, diam. 13 mill. 



Japan. 



Rotella monUifera Lam., An. s. Vert, vii, p. 8. — Reeve, Conch. 

 Syst. ii, t. 216. — Kiener, Spec. et. Icon. Coq. Viv., p. 9, t. 2, f. 4. — 

 Sowerby, in Conch. Icon, xx, f. 5. — Rotella javanica Lam., teste 

 Kiener, 1. c. — Delessert, Rec. de Coq., t. 34, f. 4. — Sowerby, Thes. 

 Conch. V, p. 139, f 23; in Conch. Icon., f 8. — Globulus moniliferus 

 Lam., Phil., Conchyl. Cab., p. 52, t. 8, f. 6, 7, 8. — Umboniam monili- 

 ferum Lam. A. Ad., P. Z. S. 1853, p. 188.— Dkr., Ind. Moll. Mar. 

 Jap., p. 135. — JJmbonlum javanicavi Lam. Ad., P. Z. S. 1853, p. 188. 



This species has affinities with U. costatum. It is readily recog- 

 nized by the row of suhsutural beads or tubercles. One of the 

 shells before me is very light colored, the tessellations of a light fawn 

 tint. , 

 U. JAPONicuM Sulliotti. 



Shell rather solid, diaphanous, lucid, conoidal more or less eleva- 

 ted ; whoi'ls 5, plane, separated by a little deepened suture; suture 

 of the last whorl ornamented by a granulose cingulus ; first whorl 

 smooth, the remaining minutely cingulate, ornamented with close, 

 oblique, sinuous stride; last whorl subangulated ; strite more conspic- 



