SIPHONODENTALIUM. 141 



nate bands. Sculpture: there are a few remote, irregular oblique, 

 transverse striae ; in the young shell the whole surface is covered 

 with longitudinal striae, excessively minute (0*0005 in. apart), sharp 

 and regular, but which seem very easily rubbed off (on two specimens 

 they are barely traceable), and which disappear towards the mouth. 

 The mouth is round, very oblique, sharp, and thin. The apex is 

 minute, and is broken straight across, and somewhat chipped. 

 Length 0-185 inch., breadth 0'024 ; at apex, O'OOS inch. ( Watson). 

 Torres Strait, Cape York, N. E. Australia, 3-11 fms. (Challenger). 



Siphodentalium eboracense WATS., Journ. Linn. Soc. Lond., xiv, 

 p. 523 (1879) ; Chall. Rep., p. 17, pi. 2, f. JO. 



Than Siphodentalium prionotum Wats., this is smaller, straighter> 

 but toward the apex more bent, not narrowed at the mouth ; smaller 

 at the apex, and the whole texture of the shell is different. Than 

 Siphodentalium vitreum Sars, this is less cylindrical, is not con- 

 tracted toward the mouth, and is much smaller toward the apex. 

 ( Watsoii). 



SIPHONODENTALIUM (?) N. SP. PI. 28. figs. 6, 7, 8, 9. 



A species of Siphonodentalium, or an immature Cadulus allied to 

 C. dalli, is represented in the Jeffreys collection, U. S. Nat. Mus., 

 by two individuals, the smaller of which is figured on pi. 28, figs. 6, 

 7, lateral and convex aspects, figs. 8, 9 representing the larger shell. 

 The surface is smoothish and polished, with perceptible growth-striae ; 

 hyaline, with some obliquely encircling white lines; section subcir- 

 cular, a mere trifle compressed vertically. Apex with two lobes or 

 teeth on the convex side, but apparently broken along the line of 

 growth on the concave side from one lateral slit to the other, so that 

 the number of teeth upon this margin is unknown ; both specimens 

 being alike in this particular. 



Length 3'3, mill. ; diam. at aperture 0'6 x 0'64, at apex 0*26 mill. 

 (figs. 6, 7). 



Length 4'4 mill. ; diam. at aperture 0'6 x 0'62, at apex 0'26 x 0'28 

 mill, (apical teeth broken ; figs. 8, 9). 



Korea, in 54 fms. (St. John). U. S. Nat. Mus., no. 107705. 



The material is too imperfect for generic determination, although 

 taking locality into consideration, the specific form should be recog- 

 nized from the above details when again encountered. 



