OP CONCHOLOGY. 77 



Shell thick, solid, elongately pyramidal, last whorl slio;htly 

 ventricose, spirally finely ridged, interstices impressly striate, 

 armed with acute standing out tubercles, the row on the middle 

 of the whorls the largest ; whorls 9, somewhat angular at the 

 centre ; aperture rather small, posterior callus thick,, canal 

 short, outer lip crenulate. White, with occasional reddish brown 

 spots. 



Remarks. — 'Authors do not appear to agree as to the species 

 figured by Adanson and described by Bruguiere as Q. Adanson, 

 inhabiting the West Coast of Africa. The only figure I have 

 met with which agrees with the original, is that in Wood's Ind. 

 Test., all others together with descriptions refer to other species. 

 Mr. Reeve selected a species, collected by Mr. Cuining at the 

 Paumotus, specimens of which I have received from the same 

 locality, where it is found associated with 0. ecJiinatum , Lam., 

 O. cohimna, Sowb., &c. As it proves to be quite distinct from 

 the Atlantic species, I separate it under the above name, with 

 slight additions to Mr. Reeve's description. 



Cbrithium sculptum, Pease. Plate viii, fig. 8. 



T. elongato-pyramidata, subventricosa, aut cylindracea, spira- 

 liter noduloso-lirata, sutura granulis marginata,_longitudinaliter 

 obsolete costata, ubique regulariter et conferte impresso-striata ; 

 anfr. plano-convexis ; apertura magna; canali recurvo, subelon- 

 gato ; alba, apice purpurascens. 



Long. 30, Diam. 12 mill. 



ITab. — Insl. Paumotu. 



Shell elongately pyramidal, somewhat ventricose or cylindrical, 

 spirally nodulosely ridged, longitudinally obsoletely ribbed, en- 

 graved throughout regularly and evenly with close set impressed 

 striae ; whorls flatly convex ; aperture large ; canal recurved, 

 rather long and oblique; white, apex purple. 



Remarks. — In shape the above resembles columna Sowb. The 

 small nodules with which it is encircled are regular in size, and 

 it may be distinguished by the whole surface being engraved 

 with spiral striae. I have specimens from Tahiti, which agree in 

 all respects with the above, except in being cylindrical in shape. 



Cbrithium cylindracbum, Pease. 



T. oblonga, cylindracea, anfr. ultimus subventricosus, spiraliter 

 striata ; anfr. supra longitudinaliter nodoso-costatis, costis ad 

 anfractuum ultimum evanascentis ; apertura magna ; canali ob- 

 lique, recurvo ; labro vix expanse, laqueato ; alba, apice, flaves- 

 cente. 



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