57 



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

 circular, sometimes a little irregularly shaped, hardly oblique. Colour whitish or of a dead yellow, 

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

 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. 



69. Dentalium subtorquatum Fischer. PI. VI, fig. 36. 



1871. Dcntaliinn siibtorquatioii Fischer, Journ. de Conch. XIX, [(3) XI], p. 218 and 212, 



pi. IX, fig. I. 

 1897. Dcntaliitin siibtorquatniii Fischer. PiLSBRY & SHARP, Man. of Conch., vol. XVII, p. loi. 



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 

 apex with minute, close, somewhat raised transverse striae. Ape.x entire. No longitudinal striation. 

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



Distribution. Suez (Gaudry); Kais or Gais Island, 15 fms, also lat. 2 6°5o'N., 

 long. 52°5o'E. (Melv. & St.). 



70. Dciitaliitiii amilosiDU Braz. PI. VI, figs 38, 39. 



1877. Dentaliiiin aiutlosutii Brazier, Proc. Linn. Soc. N. S. Wales, II, p. 58. 



1897. Dcntaliutii anulosiiiii Brazier. PiLSBRY & SHARP, Man. of Conch., vol. XVII, p. loi. 



Stat. 314. 7° 36' -S., 1 17° 30'. 8 E. Flores Sea. 694 Metres. Fine, sandy mud. 3 Spec. 



Diagnosis. Shell thin, transparent, tapering, slightly curved, marked by 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. Princess 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 politiDit Linn., that species being 

 distinguished by the incised lines that divide its whole length". 



Three specimens were 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 accessory tube. They resemble forms of the ■-.v^yg^ww's, EpisipJion. Anulosum 

 evidently is related to D. tornatuni 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. 



