57 



other, while the rings become flatter. Apex entire, round with thin edges; anterior aperture 

 circiilar, sometimes a little irregularly shaped, hardly obli(|ue. Colour whitish or of a dead yellow, 

 with the glimmer of a bobbin of silk. Some specimens have a dark brown deposit near tlie 

 anterior aperture. Young specimens when kept in alcohol are absolutely hyaline. 

 Length 75 mill., diam. of anterior aperture 4,2 mill. 

 Length 45 mill., diam. of anterior aperture 3,1 mill. 



Ó9. DentaliiDH subtorqitatitiii Fischer. PI. VI, tig. 36. 



1871. Dentalinin subtorqiiatuin Fischer, Journ. de Conch. XIX, [(3) XIJ, p. 218 and 212, 



pi. IX, fig. I. 

 1897. Dcïitaliiitii suhtorqnatiiDi Fischer. PiLSBRY & SllARP, Man. of Conch., vol. XVII, p. roi. 



Stat. 260. 5°36.5S., I32°55'.2E. Oft" Kei-islands. 90 Metres. Sand, coral and shells. i Spec. 



Diagnosis. Shell white, thin, narrow, shining, cylindrical, slightly curved. Encircled at the 

 ape.x with minute, close, somewhat raised transverse striae. Apex entire. No longitudinal striation. 

 Length 22, diam. 2 mill. (P. & .Sii. from Fischer). 



D istri bu tio n. Suez (Gaudry) ; Kais or Gais Island, 15 fms, also lat. 26°so'N., 

 long. 5 2° 50' E. (Melv. & St.). 



70. Dentalmiit annlosuiu. Braz. PI. VI, figs 38, 39. 



1877. Dentalinin anulosiitn Brazier, Proc. Linn. Soc. N. S. Wales, II, p. 58. 



1897. Dcntaluiui anulosnni Brazier. PiLSBRY & Sharp, Man. of Conch., vol. XVII, p. loi. 



Stat. 314. 7° 36' S., 117° 30'. 8 E. Flores Sea. 694 Metres. Fine, sandy mud. 3 Spec. 



Diagnosis. Shell thin, transparent, tapering, slightly curved, marked b}' incised circular 

 lines from the apex to the centre, and from that to the base quite smooth, apex thickened, 

 perforated, perforation entire, aperture circular. Length 14 mill. (Braz.). 



Distribution. Princcss Charlotte Bay, North East Australia, 13 fms. Sandy bottom. 

 (Chevert Exp.). 



Remarks. Brazier adds : "The upper part of this beautiful, thin, transparent shell has 

 a ringed appearance like a trachea. Allied to Dentalium poliiiiiii Linn., that species being 

 distineuished by the incised lines that divide its whole leno^th". 



Three specimens vvere obtained. The youngest individual is well-curved, much attenuated, 

 and has a very slight notch. Both the adults are nearly straight, with a truncated thickened 

 apex and a small acccssory tube. They resemble forms of the subgenus Episiphon. Anulosum 

 evidently is related to D. iornatitiu Watson, reported from the Fiji Isl., but it is larger and the 

 grooves at the top are less deep. 



a. Length 22, diam. at apert. 1,7 mill. 



b. Length 19, diam. at apert. 1,5 mill. 



c. Length 15, diam. at apert. 1,4 mill. 



SIBOGA- EXPEDITIE LIV. 



