Cadulus.} SCAPHOPODA. 823 



is visible on the concave curve too. From the angulation the curve 

 is very equable in either direction till about two-thirds along toward 

 the apex, where it bends a little more. The shell is thin, brilliant, 

 semiopaque, white. Sculpture : Very faint and fine scratches on the 

 lines 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. (Watson.) 



Length, 15 mm. ; aperture, 1-75 mm. by 2-5 mm. ; apex, 0-75 mm. 



Type in the British Museum. 



Hob. " Challenger " Station 169, north-east from New Zealand, 

 in 700 fathoms. 



2. Cadulus delicatulus, n. sp. Plate 32, fig. 7. 



Shell rather large for the genus, moderately curved, long and 

 slender, the greatest diameter contained about 7 times in the length 

 of the shell ; the tube is gradually enlarging from the small apex ; 

 a faint swelling takes place only at the anteiior sixth of length, and 

 near the aperture the tube is contracted on all sides, but moie per- 

 ceptibly on the ventral or convex side. Surface smooth and shining, 

 white, opaque, with microscopic fine growth-lines. Tube a little 

 compressed vertically. Aperture oblique, transversely roundly ovate. 

 Anal orifice circular, simple. 



Length, 12 mm. ; greatest transverse diameter, 1-75 mm. Aper- 

 ture Diameter anterior-posterior, 1-3 mm. ; diameter transverse, 

 1-5 mm. Apex Diameter, 0-5 mm. 



Type in my collection. 



Hob. Milford Sound, in 100-120 fathoms (type) ; off Great Barrier 

 Island, in 110 fathoms. 



Remarks. This species approaches in contour and size C. clavatus, 

 Gould (China and Suez), and C. fiisiformis, P. & S. (California), but 

 is distinct from both. The type was dredged by the scientific party 

 that visited the West Coast Sounds in December, 1908. 



3. Cadulus spretus, Tate and May, 1900. Plate 32, fig. 8. 



Cadulus (Gadilia) spretus, T. & M., T.R.S. S.Aust., xxiv, 1930, 102 ; P.L.S. 

 N.S.W , 1901, 420, pi. 25, f. 52 ; Hedley, Mem. A.M., iv, 328 Rec. 

 A.M., ?-, 89 ;j Suter, T.N.Z.I., xl, 55. 



Shell small, of medium proportion, well curved, variegated (in some 

 specimens) with translucent and opaque-white rings and encircling 

 bands. Surface smooth, with fine obliquely annular grooves or lines, 

 without traces of vertical striae. Aperture circular, transverse. Tube, 

 suddenly contracted quite near the oval apeiture, but exhibits a slight 

 dilatation at the end. (Tate and May.) 



Length, 5-5 mm. : diameter of apex, 0-3 mm. ; of aperture, 0-7 mm. 



Type in the Tasmanian Museum, Hobart. 



