72 



is chiot1\' on the coin't^x rur\'c\ Init is \isil)U' on ilir ninoavo oui'X'c loo. Imoiii ihr ant;iilaUon 

 llic curvt.' is Norv eiiiuiblc in cilhcr direction till about two thirds aloiis; towards the apex, whi'rc 

 it bends a little more. The shell is thin, brilliant, semi opaque, white. I^ieulptiire : \'er\' taint 

 and fine ser.Uehes on the lines ot growth. Mouth larj^e, oval, vi'rv slii;htl\- llatlened on the 

 ventral side, h'oni whieh the thin, sh.irp ed^^e is obliquely eut olV upw.irds towards the eon\ ex 

 ctirve. The posterior opening- is niueh sni.dler. nearly rtnmd, and the ed^e is thin and ehipped. 

 Length 0,58 inch., breadth .u month 0,067, greatest 0,1, at apex 0.0^^ ^ ineh. ^\\'.\tson). 



1 ) i s t r i b u t io n l.at. 37'^34'S., i79~^22'E., N. E. point of Xew-Zealand, in 700 hns. 

 (Challenoer). 



Rem, irks. This is twice the size ot" C. j^ai/tts Montagu, but it resembles that in the 

 angulation, whieh however, is here more marked at the summit oi the swellin;^'; its expansion 

 from the smaller end is more oradual, and its contraetion from the angulation to the mouth 

 is more rapid. (^W'.vtson). 



The meastirement of three Siboga specimens is given here: 

 a. Length 20 mill., antero-posterior diam. o( apert. 2 mill., lateral diani. o{' apert. 2,5 mill., 

 greatest diam. of tube v ", mill., diam. ot aiiex 0,8 mill. 



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

 />. Length 1 7 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 ecjuator, measured on a lateral side, 5,5 mill. 

 <■. 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 0,0 mill. 



L")istance from mouth to equator, measured on a lateral side, 4.5 mill. 



Though the size is much greater than in W .vrsoxs specimens the resemblance witli 

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

 impossible to separate them. 



20. Cadii/us virgiiia/is n. sp. PI. \'I, tigs 60 — 64. 



Stat. 52. y"' 3 .4 S., ii9''56'.7E. Savu Sea. 959 Metres. Globigeriiia ooze. 5 Spec. 

 Stat. 208. 5''\i9 S., 122° 12' E. Banda Sea. 1886 Metres. Solid green mud. 3 Spec. 

 Stat. 271. 5''46'.7S., i34°o'E. Arafvu-a Sea. 17SS Metres. Bluish green mud of a unitorm 



appearance, i Spec. 

 Stat. 2S4. 8^43.1 S., 127'^ 16.7 E. Timor Sea. 82S Metres. Grey mud. 2 Spec. 



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



and superficial longitudinal furrows, which are only visible b\ turning the 



x~_^ shell slowly round under a strong lens. Growth striae hardly discernable, 



but many close trans\erse opaque bands give together with the longitudinal 



.vnt. «port. ItVapicai orifice opaque Striae a reticulated appearance to the shell's surface. Strongly 



of CaJiiim virshiaih. swolleu, greatest diameter at a distance of about 3 mill. tVom the anterior 



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



