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Show 1883.] 'LIGHTNING'AND 'PORCUPINE ' EXPEDITIONS. 99 body-whorl only, or on the upper whorls, or round the umbilicus some (var. coronata) have a row of beads below the suture. In all my specimens there is a minute tubercle on the broad and fretted pillar near its base, but not at its base as stated by Mr. Dall in the description of his specimens. The young are always umbilicate. Philippi's description of his genus Oxystele in tbe ' Handbuch der Conchyliologie und Malacozoologie,' 1853, p. 210, is as follows:- " Oxystele, Ph. 1847, Zeitschr. f. Malak. p. 19'. Das Gehause ist conoidisch, glatt, ungenabelt, anstatt des Nabels eine dunne porzel-lanartige Ausbreitung der Spindel; diese ist platt, schneidend, geht allmahlig in die dunne iiussere Lippe fiber. Tr. merula." These characters exactly suit the present species. Mr. Dall proposed a new sectional name Bathymophila. The manuscript name which I had given to tbe present species was nitens; but that name had been already used for an Australian species. 11. TROCHUS SUTURALIS, Philippi. T. suturalis, Phil. En. Moll. Sic. i. p. 185, t. x. f. 23, 23a; p. 156. ' Porcupine' Exp. 1869 : St. 36. 1870 : Atl. 3, 3a, 6, 8, 9, Vigo B., 13, 24-28a, 36 ; Med. 45, Rasel Amoush, G. Tunis. Bistribution. Bay of Biscay and G. Marseilles ('Travailleur' Exp.); 174-1025 fms. Fossil. Pliocene: Monte Mario, Calabria, and Sicily. Animal pale brownish-yellow: tentacles conical, edged on each side with a purplish-brown line : eyes black, conspicuous, placed as usual in the genus : foot thick, fringed with white conical papillae, 4 on each side; no ocelli or eye-spots. The small fossil originally described and figured by Philippi did scant justice to this beautiful shell, which has now been discovered to be still living. My finest specimens are about seven tenths of an inch in length and breadth ; the colour is cream with the tint of a blush rose ; and tbe sculpture is variable as regards the beaded rows of striae. Young specimens have a deep umbilicus which is enclosed within a sharp ridge. The callus which covers the umbilicus in the adult is proportionally thinner than in the last species. T.folini of Fischer is a variety of this species. C. TROCHOCOCHLEA, Klein. 12. TROCHUS LINEATUS, Da Costa. Turbo lineatus, Da Costa, Brit. Conch, p. 100, t. vi. f. 7. Trochus lineatus, B. C. iii. p. 317 ; v. p. 203, pi. lxii. f. 9. ' Porcupine ' Exp. 1869 : St. Donegal B. 1870 : Atl. Vigo B. Distribution. N. Ireland and Anglesea to Mogador, the iEgean, Adriatic, Canaries (d' Orbigny) ?; 0-20 fms. My friend Mr. Watson kindly sent me from Madeira specimens of an allied species, 1 "62;us scharf, OTJJXJ; Saule." |
