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Show 1885.] ' LIGHTNING' A N D 'PORCUPINE' EXPEDITIONS. 47 Post-tertiary formation near Montreal, is a synonym of Torellia. His C. elegans closely approaches the present species, and seems to differ chiefly in having a smooth epidermis. 2. TORELLIA ? DELICATA, Philippi. Cyclostomal delicatum, Phil. Moll. Sic. ii. p. 222, t. xxviii. f. 3. ' Porcupine' Exp. 1870 : Atl. St. 16, 17 a, 24. Fossil. Pliocene : Messina and Calabria (Otto f Philippi, and Seguenza). Through the kindness of my friend Professor Seguenza, I have compared a fossil specimen with the recent specimens from the * Porcupine' Expedition ; and all of them exactly agree, as well as with the description and figures of Philippi. The sculpture is most delicate and exquisitely reticulated. My largest and most perfect of the ' Porcupine ' specimens is more abnormal than the rest (perhaps a variety), and resembles in shape Lacuna pallidula. I have therefore figured it as a variety of the present species in Plate V. figs. 6, 6 a. Although this shell certainly does not belong to Cyclostoma, as doubtfully given by Philippi, it wants some of the characters of Torellia, as defined by me in ' British Conchology,' vol. iv. p. 244, viz. the velvety epidermis and tubercle on the pillar. In my correspondence with Prof. Seguenza some years ago, I had suggested the generic name Trachyoma, which he adopted in his excellent treatise on the Tertiary formation of Reggio province in Calabria, 1879. 1. TRICHOTROPIS BOREALIS, Broderip and Sowerby. T. borealis, Br. and Sow. in Zool. Journ. iv. p. 375 : B. C. iv. p. 245, pi. iv. f. 2; v. p. 216, pi. lxxix. f. 6. 'Lightning' Exp. St. 4. 'Porcupine' Exp. 1869: St. 68. Distribution. Arctic ocean in both hemispheres, Iceland, Faroe I., Norway, Shetland to the Dogger Bank and coasts of Ireland, N.E. and N.W. America; 2-175 fms. Fossil. Pliocene: Coralline Crag, Sicily (Brugnone). Post-tertiary : Norway and Sweden, Scotland, Ireland, North of England and Wales, Siberia, Labrador, and Canada; 0-1360 ft. It appears that the genus is not restricted to northern seas, Mr. Ball having described a species from the Havana coast, below the Tropic of Cancer. Synonyms so numerous that it would be unnecessary to quote them. T. inermis of Hinds was founded on a specimen which had lost its bristly epidermis. An imperfect specimen of a species, which Friele procured in the ' Voringen ' Expedition on the arctic coast of Norway in 650 fathoms and named " Trichotropis (Iphinbe) injiata," occurred at Station 23a of the ' Porcupine Expedition' in 1869. |