28 



somewhat sharp, interstices nearly flat, transversely hnely striated, apex with a small perforation-, 



basal aperture large, circular. (Braz.). 



Length 20 mill., diam. of apex 0,5 mill., diam. of base 2,5 mill. 



D ist r i bu ti o n. Katow, New-Guinea, 8 fathoms, sandy mud (Chevert Exp.). 



25. DcntaliiLiii tasinaiiicnse Tenison Woods. PI. VI, fig. 34. 



1877. Dentalinui tasnianiensis (sic!) T. W., Proc. Roy. Soc. Tasmania for 1876, p. 140. 

 1897. Dentaluun tasmaniensis (sic!) T. W., PiLSBRY & Sharp, Man. of Conch., vol. XVII, p. 9. 



Stat. 302. 10° 27'. 9 S., 123° 28.7 E. Timor Sea. 216 Metres. Sand and coralsand. i Spec. 



Diagnosis. Shell small, solid, white, slender, slowly increasing, slightly curved; equally 

 8-ribbed, the intervals often subcostate; apex entire. Length 10,5, diam. 1,5, diam. of apex 

 0,5 mill. (T. W.). 



Distr ibu t io n. Northwest coast of Tasmania. 



Remarks. The only specimen obtained by the Siboga is lo-ribbed instead of 8-ribbed 

 as tasmaniense but for the rest is so well covered by the diagnosis of that species that little 

 doubt is left that the two can be identified. The Siboga specimen has a length of 14 mill., 

 with a greatest diameter of 1,7 mill. The ribs are rounded and rather prominent, and there 

 are generally three smaller riblets in each interval. 



26. Dentaliitm siuuosuin n. sp. PI. VI, fig. 22. 



Stat. 114. 0°58'.5N., 122° 55' E. Kwandang-bay-entrance. 75 Metres. Hard sand, very fine. 



2 Spec. 

 Stat. 204. 4°20'S., I22°58'E. Between islands Wowoni and Buton. 75 — 94 Metres. Sand 



with dead shells. i Spec. 

 Stat. 294. 10° 12'. 2 S., 124° 27'. 3 E. Timor Sea. 73 Metres. Soft mud with very fine sand. 6 Spec. 



Diagnosis. Shell moderately curved, very slender, finely tapering. Sculpture of nine 

 narrow sharp riblets at apex, increasing to doublé that number by the intercalation of a secondary 

 riblet in each interval. Ribs equidistant, slightly elevated, persistant toward the anterior aperture, 

 separated by flat, smooth interspaces with regular growth striae. Shell from time to time a little 

 inflated; after each annular swelling one or two growthlines are more marked than the others. 

 Apex very much attenuated, simple, without notch or slit, the ribs clearly visible. Anterior 

 aperture circular, a little oblique, regularly crenated by the 18 riblets; thin edged. Colour of a 

 uniform yellowish tint, young specimens brilliant and white. 

 a. Length 33 mill., greatest diameter 2,3 mill. 

 ó. Length 23 mill., greatest diameter 2,1 mill. 



27. Dentaliuiii pajiciconiortu])i n. sp. PI. VI, figs. 25 — 28. 



Stat. 95. 5°43'.5 N., II9°40'E. Sulu Archipelago. 522 Metres. Stony bottom. 31 Spec. 

 Stat. 105. 6° 8' N., 121° 19' E. Sulu Archipelago. 275 Metres. Coral bottom. i Spec. 



