512 



REV. R. BOOG WATSON ON THE 



it is very faintly scratched all over by very sliglit lines which 

 run elliptically round the shell. The apex has a very narrow, 

 slightly ragged fissure, about 0"027 in. long, which lies unsym- 

 metrically on the convex curve. L. ? B. 9. 

 This differs from D. leptosceles, W., in being more curved and 

 more conical. It resembles in form the young of D. luhricatum, 

 G. B. Sow., B. M., " from Australia ;" but in that the transverse 

 striae are much less oblique, and the surface is lubricate and 

 polished. 



6. Dentalium entalis, Linn., var. D. striolatum, Stimpson ; 

 Linn. Syst. Nat. p. 12G3 ; Stimpson, Shells of JVew Midland, 

 1851. 



St. 49. May 20, 1873. Lat. 43° 3' N., long. 63° 39' W. Off 

 Halifax, N. A. 83 fms. G-ravel, stones. 



One specimen, which, like L>. ahyssorum, Sars, is a little less 

 attenuated than the D. striolatum, Stimp. Compared with the fol- 

 lowing this is rather short, bent, audi faintly striate. 



(2) Var. AGILE, Sars, Bern. Forms ^c. JSorw. Sfc. 1872, p. 31, pi. iii. 

 figs. 4-15, = D. incertum, Phil, (nec Desh.), = T>. fusticulus, Brug. 



St. VIII. Feb. 12, 1873. Gomera, Canaries. G20 fms. Sandy 

 mud and shells. 4 specimens. 



In the animal of these specimens the tentacles are many, 

 short, small, and equal. The two lobes of the liver are equal ; 

 the anal spatula is rather longer than usual. This variety is long ; 

 straight, and smooth. The Marquis de Monterosato (Nuov. 

 Eevista, 1875, p. 20) gives it as living in the Mediterranean, and 

 as found fossil in the post-Pliocene beds of Italy (Cat. Conch. 

 Fos. 1877, p. 8) (see also Phil. Enum. ii. 207). Sars, too, gives it 

 as living in the North Atlantic and found in the Norwegian post- 

 Pliocene beds. 



(3) Var. orthrum, W. 



St. II. Jan. 13, 1873. Lat. 38° 10' N., long. 9° 14' W. Setubal. 

 470 fms. GloUgerina-ooze. 2 specimens. 



St. 75. July 2, 1873. Lat. 38° 37' N., long. 28° 30' W. Fayal, 

 Azores. 450 fms. Sand. 1 specimen. 



St. 145. Dec. 27, 1873. Lat. 4G° 40' S., long. 37° 50' E. 

 Prince Edward's Island. 150 fms. 1 specimen. 



This variety is rather long, straight, and sharply striate toward 

 the apex. 



