/ - 



is chieflv on the convex curve, but is visible on the concave curve too. From the angulation 

 the curve is very equable in either direction till about two-thirds along towards the apex, where 

 it bends a h'ttle more. The shell is thin, brilliant, semi opaque, white. Sculpture : Very faint 

 and fine scratches on the Hnes of growth. Mouth large, oval, very slightly flattened on the 

 ventral side, from which the thin, sharp edge is obliquely cut off upwards towards the convex 

 curve. The posterior opening is much smaller, nearly round, and the edge is thin and chipped. 

 Length 0,58 inch., breadth at mouth 0,067, greatest 0,1, at apex 0,033 '"ch. (Watson). 



Distribution Lat. 37°34'S., 179° 2 2' E., N. E. point of New-Zealand, in 700 fms. 

 (Challenger). 



R e m a r k s. This is twice the size of C. gadus Montagu, but it resembles that in the 

 ano-ulation, which however, is here more marked at the summit of the swelling; its expansion 

 from the smaller end is more gradual, and its contraction from the angulation to the mouth 

 is more rapid. (Watson). 



The measurement of three Siboga specimens is given here : 



a. Leno-th 20 mill., antero-posterior diam. of apert. 2 mill., lateral diam. of apert. 2,5 milL, 



greatest diam. of tube 3.3 mill., diam. of apex 0,8 mill. 



Distance from mouth to "equator", measured on a lateral side, 6 mill. 



b. Length 17 mill., antero-posterior diam. of apert. 2 mill., lateral diam. of apert. 2,3 mill., 



greatest diam. of tube 3 mill., diam. of apex 0,8 mill. 



Distance from mouth to equator, measured on a lateral side, 5,5 mill. 



c. Length 16 mill., antero-posterior diam. of apert. 2 mill., lateral diam. of apert. 2,3 mill., 



greatest diam. of tube 3,5 mill., diam. of apex 0,9 mill. 



Distance from mouth to equator, measured on a lateral side, 4,5 mill. 



Though the size is much greater than in Watson's specimens the resemblance with 

 the latter, (after comparison with the types in the British Museum) is so great, that it seems 

 impossible to separate them. 



20. Cadulus virgiiialis n. sp. PI. VL figs 60 — 64. 



Stat. 52. 9°3'.4S., 119° 56'./ E. Savu Sea. 959 Metres. Globigeriiia ooze. 5 Spec. 

 Stat. 208. 5°39'S., 122° 12' E. Banda Sea. 1886 Metres. Solid green mud. 3 Spec. 

 Stat. 271. 5°46'.7S., 134° o' E. Arafura Sea. 1788 Metres. Bluish green mud of a uniform 



appearance. i Spec. 

 Stat. 284. 8°43'.i S., i27°i6'.7E. Timor Sea. S28 Metres. Grey mud. 2 Spec. 



Diagnosis. Shell rather strongly curved, translucent and glossy, with numerous faint 



and superficial longitudinal furrows, which are only visible by turning the 



V — ' shell slowly round under a strong lens. Growth striae hardly discernable, 



but many close transverse opaque bands give together with the longitudinal 



Ant a en Ind apicai orifice op^que Striae a reticulated appearance to the shell's surface. Strongly 



of Cadulus virginaih. swollen, greatest diameter at a distance of about 3 mill. from the anterior 



aperture, measured on the inward curve. Anterior to the equator the tube is flattened on the 



