RING* i i. \. HI 



inently produced, and tin- penultimate whorl is in. .re than usually 

 developed, so as to be more intermediate in .-i/.e between tin- others. 

 All these species are of one uniform glassy seiniopiujur color, in some 

 individuals being more glassy, in others more opaque. (Jfcto.). 



Crosse gives the following description from a .-liirlitlv \\..ni 

 specimen collected by Angas: Imperforate, ohlonjr, rather thick, 

 white, smooth ; whorls ;">', moderately convex ; the last longer than 

 spire, rotund, attenuated at base, aperture coarctate, siitmurifoi -m, 

 margins joined by a strong callus which bears a rather prominent 

 tubercle; columella dilated, Implicate, the basal fold larger; outer 

 lip thick, reflexed. Alt. 3, diam. 1 ii mill. 



Mr. Brazier apparently did not recognize the fact that Crosse's 

 Jt. australis is stated by him to be the species of Hinds. 



R. DENTICULATA Gould. Unfigured. 



Shell ovate, acuminate, solid, milk-white, engraved with transverse 

 close striae (narrower ones being sometimes intercalated) ; whorls 5, 

 ventricose ; aperture narrow, lip thickened, denticulate within, nearly 

 interrupted at sipbonal sinus, folds transverse, acute, callus moder- 

 ate, hardly appressed, the parietal tooth moderate. Alt. 5, diam. 

 3-5 mill. (G7d.). 



Port Jackson (Stimpson). 



R. denticulaia GLD., Proc. Bost. Soc. N. H. vii, p. 325 (Sept. 

 1860); Otiap. 121. 



The numerous striae, denticulate labium, and scantiness of callus 

 about the si phonal notch, mark this species. (G7c?.). 



K. AIJYSSICOLA Brazier. Unfigured. 



Shell thin, white, somewhat acuminate, whorls 4', moderately 

 convex, opaque at the suture, smooth last whorl large, encircled be- 

 low the center with four transverse lines ; columella with two strong 

 plaits turned back over the front of the last whorl, above with one 

 prominent callus like tooth, joined to the upper part near the suture, 

 aperture small, auriform; outer lip thickened and reflected, having 

 in the center a prominent tubercular callosity, with a minute one 

 below near the region of the small canal. Length , diam., n 

 lines. (7>Vaz.). 



Darnley Inland, Torres Straits 30 fathoms, sandy mud; 2 spec- 

 imens. 



R. abyssicola BRA/., Proc. Linn. Soc. X. S. Wales ii, p. 7*. 1877 



