140 



smooth. A very elegant species, Chappell Island, Bass 

 Strait. Legrand. 



1^0.23. Cerithiopsis ALBOSUTURA. n.s, C.t. elongata, pyrami- 

 dali, carinata, badia saturata, marginibus spirce planatis, suturis 

 impressiis, marginatis, et pecnliaiiter albo lineatis, quasi lanugeris; 

 anfrac. 9 ; nucl '^ {decollatis) radiatim creberrime liratis ; liris miimtiSy 

 inter carinulis tantum et supra nou transeuntibus ; carinis tribiis, 

 spiralibus, Icevibus, rotundatis, hand extantibus, supra patdo pallidi- 

 oribus, interstitiis cequalibus, concavis ; basi vix concava, radiatim et 

 undulatim sulcata ; columella recta, spiraliter retro plicata ; canali 

 brevi, aperto ; labro tenui, teuuiter undulato. Long. 12, lat. 2h mil. 

 Islands in Bass' Straits. W. F. Petterd. 



There is a tricarinate dark brown species of this genus in 

 the West Indies, C. terelellum, C B. Adams ; and one from the 

 Mediterranean, C. irilineatum, Phil., which resemble the above 

 very closely. Considering what we have learnt fx'om deep sea 

 dredging as to the wide range of species, these three may 

 possibly be the same. C trilineatu7n is a little swollen on the 

 spire. The special peculiarity of this species is the white 

 suture which is more like a white cottony incrustation than a 

 coloring of the substance of the shell, and this appearance 

 occurs at intervals in the interstices between the keels. 



No. 24. TcRRiTELLATASMANiCA. 11. s. T.t. pavva, acuminato turrita> 

 alba tenui; anfr. 11, angidatis, carinatls et subtillissime valde sinuoso- 

 striatis ; carinis proscipuis, 2, sed j^nrvioribns instructis ; interstitiis striis 

 spiralibus, tenuiius cequidistanfibus cinctis ; basi convexa, spiraliter lirata, 

 apertura quadrata ; columella alba, cncausta. bene dejinita. Long. 13. 

 lat. 4, mil. 



Shell small, acuminate, turretted, white thin; whorls 11, 

 angulate and keeled, and with very fine widely sinuated 

 strife ; principal keels 2, but furnished with smaller ones, the 

 interstices girdled with fine equidistant spiral strise ; base 

 convex, spirally lirate, aperture quadrate, columella white, 

 enamelled, vind well-defined. Long Bay, Eev. H. D. Atkin- 

 son. Obs. Differing from T. simiata, Reeve (Icon. pi. II. 

 fig. 62), in the whorls and promineut keels besides being 

 smaller and destitute of color. I suppose that the mouth is 

 sinuous from the striae, but no specimen with a perfect labrum 

 has been seen by me. 



No. 25. Dentalium tasmaniensis. n.s. D.t. parva, solida, alba, 

 gracile, lente crescenti, vix curvata, cequdlifer S cosfata, interstitiis 

 aliquando subcostatis, apice integro. Long. 10?,, lat. 1?;. Lat. apicis 

 I mil. North West coast. W. F. Petterd. 



This is a gracefully tapering shell, curved slightly, with 

 valid ribs and often smaller ones in the interstices. 



No. 26. Dentalium weldiaxa. n.s. D.t. parva, subcylindrica, 

 nitente, albida, suhpellucUa, vix curvata, obsolete ceqiuiliier costata, apice 

 integro. Long. 10 (decoll), lat. 1^. Lat. apicis L North Coast. W. 

 F. Petterd. 



