CADULUS-GADILA. 179 



sulcus, whence the shell tapers evenly backward ; aperture slightly 

 oblique ; anal aperture nearly circular, concavely arched, but not 

 notched in front and behind ; longitude of shell on its dorsal chord, 

 24 ; perpendicular to the chord, 2 ; diameter of oval aperture, 3 ; 

 antero-posterior diameter, 1*5; diameter of anal aperture 1 ; maxi- 

 mum diameter of shell, 3'4 ; antero-posterior diameter of shell, 3 

 mill. (Dall}. 



Off Mania, Ecuador, about JfD miles south of the equator, in Ion. 

 81 W., 401 fms.; Gulf of Panama, 1,672 fms. (Albatross). 



Cadulus albicomatus DALL, Proc. U. S. Nat. Mus., xii, p. 259, pi. 9, 

 f. 8. 



This species was obtained about 40 miles south of the equator in 

 west longitude 81. It is one of the largest and finest species of the 

 genus, and the only one known to me which is distinctly longitudi- 

 nally sculptured (Dall}. 



The longitudinal striation is similar to that of Dentalium calamus, 

 but rather finer. The grooves are very regularly and rather deeply 

 engraved. 



C. STRIATUS Dall, n. sp. PI. 35, figs. 9, 10, 11, 12, 13. 



Shell very large, rather slender, moderately bent ; bluish-white, 

 more opaque white near the apex and upon the most inflated por- 

 tion ; surface glossy, seen under a lens to be densely and finely stri- 

 ated longitudinally, the striation subobsolete near apex and aperture. 

 Tube without any pronounced inflation, somewhat compressed be- 

 tween the convex and concave sides, gradually increasing from the 

 apex nearly to the aperture, then then abruptly depressed or con- 

 tracted on the convex side, with a small, flattened, slightly concave 

 area just behind the lip ; slightly contracted laterally but not on 

 the concave side. Aperture oblique, oval, somewhat flattened on 

 the convex side ; peristome acute, excised on the convex side. Anal 

 orifice simple, subcircular, the edge excavated in front and behind 

 (fig. 12). 



Length 24'8 mill. ; diam. at aperture 2'0 x 2'5, at largest 2'7 x 2'9. 

 at apex 1 x 1-2 mill. 



Gulf of Panama, in 322 fms. (Albatross). 



Very similar to C. albicomatus Dall, but the longitudinal striae 

 which in that species are close, even and deeply engraved, are here 

 more slight, shallow, less regularly and evenly developed. It is also 

 a more slender species. Numerous specimens were taken at Fish 



