658 DR. GWYN JEFFREYS ON THE MOLLUSCA OF THE [Nov. 14, 
gium to the Adriatic, and throughout the Mediterranean to Smyrna ; 
0-543 fms. 
Fossil. Miocene: Belgium, Piacentino and Parma. Upper 
Tertiaries: S. France, Italy. Post-tertiary: Ireland, Lancashire, 
Cheshire, S. France, and Tuscany. 
Synonyms several, including D. fasciatum and perhaps D. nebu- 
losum of Gmelin, and the D. entalis of most continental writers as 
well as of E. Forbes. As fossil it is D. fusticulus of Brugnoune. 
Da Costa’s name vulgare is certainly prior to Lamarck’s name; but 
it would be inconvenient now to substitute it for tarentinum, which 
has been for between sixty and seventy years accepted and used by 
nearly every conchologist. 
_The stomach of this Dentalium is a repertory of littoral Forami- 
nifera. It is not, like Spatangus or Synapta, an indiscriminate 
swallower of sand, but a fastidious Pig from the herd of Epicurus, 
luxuriously picking out the choicest morsels with its extensile and 
delicate captacula. Adriatic specimens of the shell collected by 
Professor Stossich are 23 inches in length and very fine. 
4. DenTatium capiLiosuM, Jeffreys. (Plate XLIX. fig. 1.) 
D. capillosum, Jeffr. in Ann. & Mag. N. H. Feb. 1877, p. 153. 
* Porcupine’ Exp. 1879: St.47. 1870: Atl. 13, 16, 17. 
Distribution. G. Mexico, off Bahia Honda (Pourtales), ‘ Challen- 
ger’ Exp., off the Azores, ‘ Valorous’ Exp. ; 418-1785 fms. 
Differs from D. tarentinum in being proportionally narrower and 
more uniformly cylindrical, straighter and not abruptly curved to- 
wards the point, and in the close-set strie which completely and 
regularly cover every part of the shell, instead of being much finer 
on the smaller or posterior part. Fragments from the ‘ Valorous’ 
Expedition show that it grows to a much larger size than any other 
North-Atlantic species. In the ‘ Travailleur’ Expedition of 1882, 
several living specimens were dredged between Lisbon and the 
Canaries, of an extraordinarily large size and thickness, and having 
a long terminal slit. 
, 5. DENTALIUM CANDIDUM, Jeffreys. (Plate XLIX. fig. 2.) 
D. candidum, Jeffr. in Ann. & Mag. N. H. Feb. 1877, p. 153. 
‘ Porcupine’ Exp. 1869: St. 16, 21, 23, 23a, 28, 31, 37, 38. 
Distribution. ‘ Valorous’ Exp. ; 410-1750 fms. 
Some fragments are of an extraordinary thickness. 
6. DeNnTALIUM AGILE, M. Sars. 
D. agile (M. Sars), G. O. Sars, ‘On some remarkable forms of 
Animal Life from the great deeps off the Norwegian coast,’ i. 1872, 
p. 31, pl. ii. £ 4-15. 
‘Porcupine’ Exp. 1869: St. 3, 5, 6, 7, 11, 13, 14, 15, 36, 39, 
41, 45, 65. 1870: Atl. 1, 2, 3, 3a, 13, 16, 17 (very thick), Se- 
tubal B., off C. Espichel, 22, 24-34; Med. 40, 55, Adventure 
Bank. 
Distribution. Loffoden I. to Bergen coast (Sars and others), 
