12 THE VOYAGE OF H.M.S. CHALLENGER 



Dentalium dentalis, Philippi, Enum. Moll. SiciL, vol. i. p. 243, vol. ii. p. 206, sp. 1, p. 207, sp. 3. 



Dentalium costatum, Wood, Crag. Moll., Pal. Soc, vol. i. p. 188, pi. xx. fig. 1. 



Dentalium dentalis, Sowerby, Thes. Conch., pt. 20, vol. iii. p. 101, pi. ccxxiv. (Generis ii.), fig. 14. 



„ „ Weinkauff, Conch. Mittelm., vol. ii. p. 419, sp. 2. 



„ ,, Monterosato, Enumeraz., p. 16. 



„ ,, Keeve, Conch. Icon., vol. xviii. pi. iv. fig. 21. 



,, „ Seguenza, Form. Terz. Calabria, pp. 117, 357. 



Station 75. July 2, 1873. Lat. 38° 38' N., long. 28° 28' 30" W. Fayal, Azores. 

 450 fathoms. Volcanic mud. 



Simon's Bay, Cape of Good Hope. December 1 8 73. Sand and shells. 1 5 to 20 fathoms. 



Habitat. — Living in the Mediterranean, the S.W. of France, and the Canaries, but 

 not Madeira. 



Fossil. — From the Upper Miocene onwards (Seg.) 



Dr Gwyn Jeffreys was good enough to examine these specimens for me, their state and the 

 newness of the locality making confirmation specially desirable. 



16. Dentalium javanum, Sowerby. 



Dentalium javanum, Sowerby, Thes. Conch., pt. 20, voL iii. p. 102, sp. 39, pi. ccxxiii. (Generis i.) fig. 12. 

 ,, „ Reeve, Conch. Icon., vol. xviii. pi. iii. fig. 14. 



September 7, 1874. Torres Strait, Cape York. 3-11 fathoms. 



Station 186. September 8, 1874. Lat. 10° 30' S., long. 142° 18' E. Wednesday 

 Island, Cape York. 8 fathoms. Coral mud. 



Station 188. September 10, 1874. Lat. 9° 59' S., long. 139° 42' E. W. of Cape 

 York, Australia, S. of Papua. 28 fathoms. Green mud. 



Habitat. — Malacca (British Museum). 



Dentalium octogonum, Linn, (which this much resembles) has much stronger intracostal striae, 

 and the ribs are much more sharply prominent. 



17. Dentalium ensiculus, Jeffreys (PI. II. fig. 2). 



Dentalium ensiculus, J. Gwyn Jeffreys, "Valorous" MolL, Ann. and Mag. Nat. Hist., ser. 4, 1877, 

 vol. xix. p. 154. 

 „ „ J. Gwyn Jeffreys, "Lightning" and "Porcupine" MolL, Proc. ZooL Soc, 1882, 



p. 660, pi. xlix. fig. 4. 



Station 23. March 15, 1873. Lat. 18° 24' N., long. 63° 28' W. Off Sombrero Island, 

 West Indies. 450 fathoms. Pteropod ooze. 



Habitat. — North Atlantic, 1450 to 1785 fathoms; West of Ireland, 1366 fathoms; 

 Bay of Biscay, 862 fathoms; Portugal, 740-1095 fathoms (Jeffr.) 



The bore of the shell lies quite on the convex side, and toward the apex is disproportionately small. 



