1882.] ‘LIGHTNING’ AND ‘PORCUPINE’ EXPEDITIONS. 657 
‘Porcupine’ Exp. 1870: Atl. St. Vigo B., Tangier B.; Med. 
Cartagena B., 50, G. Bona, Benzert Road, G. Tunis, Adventure 
Bank. 
Distribution. Finistérre to the Archipelago and Sea of Marmara, 
Adriatic, Morocco, off Cape of Good Hope (‘Challenger’ Exp.), Canary 
Isles and Madeira; 0-150 fms. The Irish and Cornish localities 
mentioned in ‘ British Conchology,’ iii. pp. 196 & 197, are doubt- 
ful, although it is not improbable that this species may be found 
there as well as on the opposite coast of France. Mighels, in his 
‘ Catalogue of the Shells of Maine,’ gives ‘‘ D. dentale,” saying that 
a specimen had been taken from the stomach of a haddock caught 
far out at sea in very deep water. It is more likely to have been 
the D. striolatum of Stimpson. 
Fossil. Upper Tertiaries: Red and Coralline Crag, Antwerp, S. 
France, Italy, Morea, Archipelago. Post-tertiary: S. France. 
I have noted 18 synonyms, the principal being D. novemcostatum 
of Lamarck and D. costatum of J.Sowerby. D. striolatum of Risso 
is a variety, and must not be mistaken for Stimpson’s species. The 
specific names dentalis and entalis are not adjectives. 
/ 2. DenTALIUM PANORMITANUM (panormum), Chenu. 
D. panormum, Chenu, Ill. Conch. t. 6. f. 13 (1842-47); G. B. 
Sowerby, Thes. Conch. pl. ccxxiv. f. 18. 
‘ Porcupine’ Exp. 1869, St. 1, 45a, 456. 1870: Atl. C. Sagres, 
36; Med. Capo de Gata, off Jijeli, 55, Adventure Bank, 58. 
Distribution. Bay of Biscay (‘ Travailleur’ Exp. 1880), Mediter- 
ranean and Adriatic; 30-195 fms. 
Fossil. Upper Tertiaries: Antwerp Crag, Italy and Sicily. 
Having examined and compared an extensive series of specimens 
from various places, I have come to the conclusion that, according 
to the received notions of a species, this must be considered distinct 
from D. dentalis and not merely a variety. Independently of the 
much greater length, the ribs are finer and far more numerous and 
regular, and they are extremely slight or become mere striz on the 
anterior part or in front. The shell is also more tapering and pro- 
portionally narrower. It attains the length of 3 or 4 inches. Some 
specimens have the same pipe at the posterior extremity as in 
D. dentalis. 
It appears to be D. psendo-antalis of O. G. Costa (but not of 
Lamarck), D. pseudo-entalis of Scacchi (not of Deshayes), and 
D. lessoni of G. B. Sowerby (not of Deshayes) in part, D. arguticosta 
of Brugnone, and D. semiclausum of Nyst. As it has been in all 
probability confounded by other authors with D. dentalis, it is almost 
impossible to disentangle the synonymy of both these species. 
l~ 3. DENTALIUM TARENTINUM, Lamarck. 
D. tarentinum, Lam. An. s. Vert. v. p. 345, var. B: B. C. iii. 
p- 195; v. p. 197, pl. lv. f. 2. 
‘Porcupine’ Exp. 1869, St. Galway B. 
Distribution. West of Ireland, Holyhead, Cardigan B., and Bel- 
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