440 EUCHELUS. 



the last part of the body-whorl; spiral ribs on the penultimate 

 whorl 7 to 9 ; on the last whorl 12, exclusive of the interstitial 

 riblets ; last whorl rounded, convex, quite abruptly and decidedly 

 descending at the aperture; aperture rounded, strongly, finely sul- 

 cate inside ; columella straight, with a small projecting tooth at 

 base ; umbilicus deep, bounded by a strong white rib, about 1 mill, 

 diam. 



Alt. 13, diam. 12 mill. Alt. 20, diam. 19 mill. Alt. 23, diam. 

 20 mill. 



Viti Is. ; Nicohar Is. ; Vanikora ; Fiji Is. ; Moluccas ; Sorong ; 

 Singapore; Philippines. 



Turbo atratus Gmel., Syst. Nat. xiii, p. 3601. — Trochus atratus 

 Gm., Phil., Conchyl. Cab., p. 174, t. 27, f. 14. — Fischer, Coq. 

 Viv., p. 293, t. 94, f. 3. — Monodonta canaliculata Lam., An. s. Vert, 

 vii, p. 37. — Delessert, Rec. de Coq., t. 37, f. 1. — Tr. canaliculatus 

 Q. et. G. Voy. de 1' Astrol, iii, p. 261, t. 64, f. 21-25.— Euchelus 

 canaliculatus Lam., Chenu, Manuel, f. 2656. — Euchelus denigratus 

 Chem., H. & A. Ad,, Genera, t. 47, f. 6. 



The above description and first measurements corres{)ond with 

 the majority of shells before me. Larger specimens (16-23 mill, 

 alt.) are paler, and have a small riblet developed in each inter- 

 stice, thus about doubling the number of sjiirals. 



E. RUBRA A. Adams. PI. 67, fig. 79. 



Shell conical, umbilicate, solid, bright rose color, spire elevated, 

 acute ; whorls 5-6, convex, rounded, encircled by alternately larger 

 and smaller closely beaded riblets, numbering 9 on the penultimate, 

 4 on the next earlier whorl, about 14 on the last whorl, of equal size 

 on its latter portion. Sutures narrowly canaliculate ; body-whorl 

 rounded ; aperture rounded, finely sulcate inside ; columella straight, 

 toothed at base, with a narrow square notch between the tooth and 

 the tubercles of the basal lip. Alt. 8, diam. 7 mill. 



China. 



Monodonta rubra A. Adams, P. Z. S. 1851, p. 176. 



A lovely little thing, deep rose or carmine in. color, more conical 

 than E. atratus, with a tubercle below the columellar tooth, and a 

 rather deep square notch between them. Umbilicus as in atratus. 



E. INSTRICTUS Gould. PI. 67, figs. 62, 63. 



Shell small, elevated, ovate-conic, solid, white, with a series of 

 about 10 rufous spots near the suture, whorls 5, forming a conical 



