75 



way of D. polittuii and as in Cadulus zonahis\ compressed between the front and back curves. 

 On a frontal view of the inner curve, one sees that the greatest inflation 

 is at about one third the shell's length from the anterior aperture, tapering v^^_^ ° 

 evenly toward both ends; a lateral view shows hardly any inflation at all Fig. 38. Ant. apevt. 

 but the outer curve is rather suddenly flattened near the anterior aperture, i*", f'"'^^ ,°" *^^ ° 



^ ^ Ladtilus puuhcrrtmtis. 



however without the slightest trace of angularity. Anterior aperture very 



oblique, much flattened in antero-posterior direction, the margin on the outer curve straight. 



Apex subcircular, thin edged. 



Length 21,5 mill., antero-posterior diam. of apert. 1,1 mill., lateral diam. of apert. 1,5 mill.; 



greatest diam. 2 mill.; diam. of apex 0,5 mill. 



Remarks. Compared to C. zonatus, pulcherriimis is a far more slender and graceful 

 shell. It is more compre.s.sed between front and back curves, and much more attenuated. 



*25. Caduhts sitigaporcnsis Sharp & Pilsbry. PL III, fig. 51. 



1897. Cadulus singaporensis Pilsbry & Sharp, Man. of Conch., vol. XVII, p. 195, pi. 36, figs 30, 31. 



Diagnosis. Shell small, very slender, closely striated obliquely with alternate white 

 and translucent bands, smooth and glossy on the larger part, encircled by low, close wrinkles 

 near the apex. Gradually increasing from the apex to quite near the aperture, then contracting 

 moderately on all sides ; equator or point of greatest diameter, at about the anterior ninth of 

 the shell's length, the diameter there contained about /Vs times in the length. Tube faintly 

 compressed vertically throughout. Aperture not oblique, subcircular; anal orifice simple. 

 Length 5,6 mill; diam. at aperture 0,56 X 0,6, at greatest 0,75 X o,77, at apex 0,29 X 0,34 mill, 

 (the antero-posterior dimensions in each case given first). (P. & Sh.). 



Distribution. Singapore. (Dr. S. Archer). 



26. Caduhts abrupto-inflahis n. sp. PI. VI, fig. 65. 



Stat. 5. 7°46'S., 1 14° 30'. 5 E. Madura Strait. 330 Metres. Mud. i Spec. 



Diagnosis. Shell white, pretty strong, both inner and outer curve well-bent. Tube 

 circular, increasing anteriorly but slowly in diameter, until near the anterior 

 aperture it rather suddenly swells into an encircling ring, from which it X \ 



contracts again rapidly toward the anterior aperture. Apex simple, sub- V J v_y 



circular, thick-edged. Anterior aperture rounded oval, rather oblique. 

 Length of shell 12 mill., antero-posterior diam. of aperture i mill, lateral Am. apert. and apical orifice 



of Cadulus abrupto-injlatus. 



diam. 1,2. Greatest diam. 2,2 mill., at about 7^ the shells length. 



*27. Cadulus laevis Brazier. PI. Ill, fig. 43. 



1877. Dentaliuiii laeve Brazier, Proc. Linn. Soc. N. S. Wales II, p. 59. 



1897. Cadulus laevis Brazier. PiLSBRY & Sharp, Man. of Conch., vol. XVII, p. 195. 



1877. Cadulus laevis Brazier. Hedlev, Proc. Lin. Soc. N. S. Wales, vol. XXV, p. 499, 



pi. XXVI, figs 8, 9, ID. 

 Not Dentalium laeve Schlotheim. 



