i;i\',h i I \. 



I;. BOUBG1 [OH \ n Km-hehnine. I'njiyn ,*<!. 

 Shell tliick, suhfrlol' irn-i-ni-h, the s | .ire acute ; 



whorls :>, 000 ;ii;iti| l.\ <| ( c|. -mures; aperture 



the oolumellar margin eallmisrd, trident ate, narrower in the "ii ; 



lip thick, Implicate. Alt.."., diam. IT mill. . ft.). 



'kofthe ('<t*<nn> nee, Senegam l>'m, 1 ."() meters. 



/,'. houryiiiymtti RoriiKr.R., Bull. Soc. Philomath. <! Pari- (7), 

 vii, 1882-1883, p. 178 (1883). 



//"/0-/V-///V Species. 

 R. DOLIARIS Gould. PI. 47, figs. 82, 83. 



Shell large, thin, ventricose, ovate, whitish; spire acuminate; 

 whorls 4, rounded, engraved with remote transverse sulci, the last 

 whorl ample; suture profound; aperture large; lip narrow, 

 scarcely thickened ; cohimcllar folds delicate, acute; parietal fold 

 small, delicate; siphonal canal moderate. Alt. 5, diam. 3+inill. 

 (Old.). 



Hakodate Bay, Japan, 6 fms. (Stimpson). 



E. doliaris OLD., Proc. Bost. Soc. N. H., vii, p. 325 ; Otia, p. 121. 

 MORL., Journ. de Conch., 1878, p. 126. WATSON, Challenger 

 Gastrop. p. 634, pi. 47, f. 8. 



Peculiar from its thin lip and general want of callus (Old.). 



The figures are drawn from specimens identified as doli<> 

 Watson, collected at Port Jackson, Australia, by the "Challen_ 

 Watson says of them: " Gould observes that this species is peculiar 

 from its thin lip and general want of callus. The Challenger shells 

 are somewhat less tumid than the British Museum specimens, \\ant 

 the round swollen shoulder below the suture, the upper whorl:-. 

 are flatter, and the spire is rather higher; in all theso respects, how- 

 ever, the species presents* considerable range of variation, and, I be- 

 lieve, may fairly admit the Challenger specimens. The Marqi: 

 Folin, who has a large acquaintance with this m-mis, kindly exam- 

 ined all the Challenger specimens for me, and 1 re^n't that he does 

 not share my opinion regarding the shells under consideration here. 

 which he holds to represent a new species." 



R. ARCTATA Gould. PI. 47. li-s. 74. 7"), 79. 



Shell solid, ovate, acuminate, white ; whorls of the .-pi re I. con- 

 vex, the last engraved with lO-ll* spiral stri:-; Mitiire profound ; 

 aperture ear-shaped, the lip thickened, swollen within, with folds on 



