DEXTALIUM-L^VIDENTALIUM. Ill 



D. ERECTUM Sowerby. PI. 19, fig. 23. 



Shell polished, narrow, slightly curved, reddish from the middle 

 to the apex, white toward the aperture ; slit on each side (Sowb.'). 

 Length 55*5, greatest diarn. 3'9 mill, (from fig.). Length 1 inch 



(Any as). 



Port Jackson, New South Wales, Australia (Strange ; Augas). 



D. eredum SOWB., Thes. Conch., in, p. 99, pi. 225, f. 55 (1860) ; 

 Conch. Icon., xviii, pi. 6, f. 41. Antalis erecta ANGAS, P. Z. S., 

 1867, p. 220. CLESSIN, Conchyl. Cab., vi, Heft x, p. 29, pi. 9, f. 1 

 (1896). 



This tapering shell is very little curved ; the narrow end is 

 strongly colored, the larger end white. There is a slit on each side 

 of the apex. (Sowb.*). 



An unusually straight species. It was dredged by Angas near 

 the " Sow and Pigs " reef. 



D. LONGITRORSUM Reeve. PI. 20, figs. 35, 36. 



Shell much and evenly curved, very long and slender, the length 

 (of chord) about 19 times the greatest diameter; thin, but solid, 

 polished, amber or carnelian colored or tinted, or pure white. 

 Sculpture none, save inconspicuous growth lines. Aperture circu- 

 lar, the peristome thin. Anal orifice, circular, entire or ovate, and 

 with a slight notch slightly aside from the middle on the convex 

 side. Length 89, diam. of aperture 4'7, height of arch from chord 

 16 mill. 



Darnley Island, Torres Straits 30 fms., sandy mud (Chevert Ex- 

 ped.) ; west of Cape York, south-west of Papua, 25 fms. (Challenger 

 Exped.) ; Bombay (Melv. & Abercrombie) ; Gulf of Suez (Mac 

 Andrew) ; Philippines (Sowerby ; Phila. Acad. coll.) ; Zanzibar and 

 China (Brit. Mus.). 



D. longitrorsum REEVE, P. Z. S., 1842, p. 197 ; Conch. Syst., ii, 

 p. 6, pi. 130, f. 6, (1842). SOWERBY, Thes. Conch., iii, p. 98, pi. 

 225, f. 59, 60 (1860) ; and in Conch. Icon., xviii, pi. 2, f. 9a, b 

 (1872). WATSON, Journ. Linn.Soc. Lond., xiv, p. 515 (1879) and 

 Challenger Scaphopoda, p. 9 (1885). BRAZIER, Proc. Linn. Soc. 

 N. S. Wales, ii, p. 59 (1877). MELVILL & ABERCROMBIE, Mar. 

 Moll. Bombay, Mem. & Proc. Manchester Lit. and Philos.Soc. (4), 

 vii, p. 25 (1893). COOKE, Ann. Mag. N. H. (5), xvi, p. 271. Z). 

 lamarckii CHENU, Illustr. Conchyl., i, Dent., p. 5. pi. 6, f. 15, 15a. 

 D. longirostrum PAETEL, Catalog, i, p. 593. 



