058 DR. GWYN JEFFREYS ON THE MOLLUSCA OF THE [ NoV. 14, 



gium to the Adriatic, and thioughout the Mediterranean to Smyrna ; 

 0-543 fms. 



Fossil, Miocene: Belgium, Piacentino and Parma. Upper 

 Tertiaries : S. France, Italy. Post-tertiarv : Ireland, Lancashire, 

 Cheshire, S. France, and Tuscany. 



Synonyms several, including D. fasciatum and perhaps D. nebu- 

 losum of Gmelin, and the D. entails of most continental writers as 

 well as of E. Forbes. As fossil it is D. fusticulus of Brugnoue. 

 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- 

 nuera. 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 2| inches in length and very fine. 



l^ 4. Dentalium capillosum, Jeffreys. (Plate XLIX. fig. 1.) 



B. 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 (Po2<r«a^es) ,' Challen- 

 ger ' Exp., off the Azores, 'Valorous' Exp. ; 418-1785 fms. 



Differs from D. tarentinum in being proportionally narrower and 

 more uniformly cyUndrical, straighter and not abruptly curved to- 

 wards the point, and in the close-set striae 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. Dentalium 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, pi. iii. f. 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 {kiars and others), 



