266 DENTALID.E. 



Dentalium dent ale. 



Fig. 5. 



Shell polished, slightly curved, with eighteen or twenty faint, unequal ribs. 



Dentalium deiitalis, Lin. Syst. Nat. 1263. — Bork, Mus. t. 18, fig. 13. — Matox and Rack- 

 ETT, Lin. Trans, viii. 237. — Deshayes, Mem. de la Soc. d'Hist. Nat. ii. 3.'33, pi. 16, 

 fig.s. 9, 10. — Lam. An. sans Vert. v. 595. — De Kay, N. Y. Moll. 160, pi. 10, fig. 197. 

 — Gould, Inv. 1st ed. 155, fig. 5. 



Dentalium striatum, Montagu, Test. Brit. 495. 



Dentalium uttemiatuin, Say, Jourii. Acad. Nat. Sc. iv. 154, pi. 8, fig. 3. 



Dentalium occidmtale, Sti.mpson, Shells of New England, 28 (1851). 



Shell slender and tapering, curved like an elephant's tiisk, the tip 

 cut off, leaving a very small opening. Surface rather glossy, yel- 

 lowish white, marked with about twenty closely arranged, unequal, 

 rib-like strias, running the whole length of the shell. Length, about 

 an inch ; diameter at the larger end, al)Out one eighth of an inch, 



I am eiial)led to add this shell to our list through the kindness of 

 my friend W. W. Wheildon, of Charlestown, who sent iiie the speci- 

 mens, accompanied by the following memoranda : — 



Two specimens of Dentalium were taken from the stomachs of 

 codfish, in the spring of 1839, They were both found to have pen- 

 etrated the entrail of the fish, and were firmly fixed there. They 

 had probably been in the fish for some length of time. Both s|)eci- 

 mens were unfortunately eroded, one of them so much so that it is 

 quite impossible to determine any of its characters, except its size, its 

 markings being entirely obliterated. In the other specimen the stride 

 are disthict, and seem to conform to the D. dentalis of the coast of 

 England, Twenty to twenty-two striae may be counted on its surface," 



Eastport, ten to twenty fathoms ( Cooper^ ; . deep water, on the 

 coast of Maine and Massachusetts Bay ( Stimpson) . 



Ocuiis ElVTAL-IS, SowERBY. 1842. 



Differs from Dentalium by having the jicrforation at the apex 

 with a notch-like fissure on the dorsal or posterior margin. 



Entalis striolata. 



Enlolis striolata, Stimpson, Proc. Bost. Soc. iv. 114 (1851) ; Check Lists, 4. 

 Dentalium entalis, Mighels not Lin. 



This species I obtained in great numbers by dredging in from ten 

 to sixty fathoms on muddy bottoms at the mouth of the Bay of 



