RINGICULA. 411 



inently produced, and the penultimate whorl is more than usually 

 developed, so as to be more intermediate in size between the others. 

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

 individuals being more glassy, in others more opaque. (Hds.~). 



Crosse gives the following description from a slightly worn 

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

 white, smooth ; whorls 5?, moderately convex ; the last longer than 

 spire, rotund, attenuated at base, aperture coarctate, subauriform, 

 margins joined by a strong callus which bears a rather prominent 

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

 lip thick, reflexed. Alt. 3, diam. If mill. 



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

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



R. DENTICULATA Gould. Un figured. 



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 siphonal sinus, folds transverse, acute, callus moder- 

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

 3-5 mill. (G7d.)- 



Port Jackson (Stimpson). 



R. denticulata OLD., Proc. Bost. Soc. N. H. vii, p. 325 (Sept. 

 1860); Otia p. 121. 



The numerous striae, denticulate labium, and scantiness of callus 

 about the siphonal notch, mark this species. (Old.). 



R. ABYSSICOLA Brazier. Unfigured. 



Shell thin, white, somewhat acuminate, whorls 4J, 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 f diam., maj. -\ 

 lines. (Braz.). 



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

 imens. 



E. abyssicola BRAZ., Proc. Linn. Soc. N. S. Wales ii, p. 78, 1877 



