70 



edge thin, but rounded; ajaical opening small, thin, and chipped. Length o,i6 inch., breadth 

 at mouth 0,02, greatest 0,036, at ajaex 0,014 inch. (Watson). 



Distribution. Raine Island, Cape York, N. E. Australia 155 fms. (Challenger). 



*i6. Cadulus gadiis Montagu. PI. Ill, fig. 40. 



1803. Dentalitwi gadns Mont., Testacea Britanica p. 476, pi. 14, fig. 7. 

 1877. Cadulus gadus Mont. JEFFREYS, Ann. Mag. Nat. Hist. (4), XIX, p. 157. 

 ? 1885. Cadulus gadus Mont. CoOKE, Ann. Mag. Nat. Hist. (5), XVI, p. 275. 



? Cadulus gadus Mont. Melvill & AbercroMBIE, Mem. & Proc. Manch. Lit. and Phil. 

 Soc. (4), VII, p. 25. 

 1897. Cadulus gadus Mont. PiLSBRY & SHARP, Manual of Conch., vol. XVII, p. 186, pi. 31, 

 figs 28 — 32. 



Diagnosis. Shell small, rather thin, but little curved and that mainly posteriorly; 

 anterior half considerably and very regularly swollen, the greatest diameter slightly behind the 

 anterior third of the length; tapering toward the aperture, on all sides a little more rapidly 

 tapering posteriorly, decidedly attenuated toward the small apex. Outline of concave side 

 decidedly modified and quite convex in the region of the inflation. Greatest diameter contained 

 4V3 to 4V4 times in the length of the shell. Surface smooth, with a glimmer somewhat like that 

 of C. incis2is\ no perceptible growth striae; color whitish, imperfectly translucent. Tube slightly 

 compressed from front to back, throughout. Aperture quite oblique when unbroken, and 

 rounded-oval. Anal orifice very small, of the same shape, its edge apparently free from slits 

 when uninjured. 



Length 7,6 mill.; diam. at aperture 0,95 X ^,26; at largest 1,68 X 1.79 at apex 0,47 X 0,48 mill.; 

 the antero-posterior diameter given first in each case. 

 Length 6,53 mill.; diam. at aperture 0,82 X 0,9; at largest 1,37 X 1,58, at apex 0,33 X 0,42 mill. 



Distribution. Uncertain. 



Remarks. I quote from Pilsbry : The species is quite distinct in its flask-like form, 

 being conspicuously and evenly swollen but not in the lea.st angulated anteriorly, and a good 

 deal attenuated posteriorly. This peculiar and characteristic shape is for some reason more 

 conspicuous in the shells themselves or in a natural size figure, than it is in the much enlarged 

 camera drawings, although the latter are faithful in proportions. 



No specimens were obtained by the Siboga, and the habitat of this species is still 

 uncertain, but as Mr A. H. Cooke reports it from the Gulf of Suez (Mac-Andrew coll.) and 

 Melvill and Abercrombie include it in their Bombay list it seems from a practical point of 

 view better to add it for the present to the list of the Indo pacific Siphonodentalidae. 



*I7. Caduhis euloides Melvill & Standen. PL III, fig. 52. 



190 1. Cadulus euloides Melvill & Standen, Proc. Zool. Soc. II, p. 459, pi. XXIV, fig. 24. 

 Diagnosis. Shell white, small, curved, smooth, posteriorly attenuated, anteriorly above 



