Class—Scaphopoda. 
Head rudimentary ; a pair of horny jaws ; mouth surrounded by 
many filiform tentacles ; eyes none ; radula wide, of 25-30 joints, each 
of 5 plates, the median one toothed, the inner lateral, uncinated, the 
outer lateral, unarmed. Anal sinus with two openings; foot small, 
consisting of a central cylindrical lobe, with two lateral wing-like 
epipodia ; dicecious. 
FAMILY—DENTALIID. 
Body elongated. Mantle circular. Gills two, symmetrical; operculum 
none. Shell elongate ; vertex perforated, posteriorly inclined ; aperture 
circular, not constricted. 
Genus, DENTALIUM—Linneus. 
Shell symmetrical, tubular, tapering, recurved; apical perforation 
entire. 
D. zealandicum, Sowerby, tn Reeves Conch. Ic., f- 8 (1872.) 
Shell rather straight, narrow, banded with pale ferruginous brown, armed 
with numerous rough ribs, very little arched; aperture rather narrow 
(Sowerby.) 
Length, 2°3; breadth, anterior end, °35; posterior end, ‘o6 (from 
figure. ) 
D. pacificum, Hutton, CM.M., p. 5 (1873.) Solid, tapering, 
slightly curved, longitudinally grooved ; grooves unequal, about thirty at 
the anterior end, but diminishing in number towards the apex ; white. 
Length, 2°4; breadth, anterior end, *3 ; posterior end, ‘o5. 
Perhaps the same as the last. 
