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. 



Yiti Is.; Nicobar Is.; Vanikora; Fiji Is.; Moluccas; Sorong ; 

 Singapore ; Philippines. 



Turbo atratus GMEL., Syst. Nat, xiii, p. 3601. Trochus (drains 

 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. canalicnlatus 

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

 canaliculatus Lam., CHENU, Manuel, f. 2656. Euchelus den ign.it us 

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



The above description and first measurements correspond 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 spirals. 



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 silicate 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 



