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Show 668 DR. GWYN JEFFREYS ON THE MOLLUSCA OF THE [Nov. 14, Distribution. C. Croisic (Cailliaud), C. Breton (de Folin), Spain (McAndrew and others), Mediterranean and Adriatic (Poli and others) to iEgean (Forbes) ; 5-20 fms. 5. CHITON CINEREUS, Linne. C. cinereus, L. S. N. p. 1107 : B. C. iii. p. 218; v. p. 198, pl.lvi. f. 2. ' Lightning' Exp. St. 4, 5. 'Porcupine' Exp. 1869: St. 2, Lough Foyle. 1870: Atl. 36 (plate). Distribution. Greenland (Fabricius) 1, Iceland, Faroe I., Finmark to Vigo Bay; 1-150 fms. Apparently not Mediterranean nor Adriatic. Fossil. Pliocene : Sicily (Monterosato and Tiberi). Post-tertiary : Norway and Scotland ; 0-80 ft. One of the synonyms is C. asellus of Spengler. 6. CHITON ARCTICUS, G. O. Sars. Lepidopleurus arcticus, G. O. Sars, Moll. reg. arct. Norv. p. 112, t. 7. f. 7, a-h. 'Lightning ' Exp. St. 3, 4. Distribution. Spitzbergen, Greenland as C. cinereus (M. Sars) probably, Finmark and Vadso (G. O. Sars); 20-100 fms. Fossil. Post-tertiary : Norway, as C. cinereus (M. Sars) probably. This differs from the white variety of C. cinereus in its comparatively greater length and more raised or arched form, in the less distinct or regular catenation of the granules which cover the surface, and in the prominence of the lateral areas. 7. CHITON ALVEOLUS, M. Sars. C. alveolus (Sars MS.), Loven, Ind. Moll. lit. Scand. occ. hab. p. 27. Lepidopleurus alveolus, G. O. Sars, Moll. reg. arct. Norv. p. 110, t. 7. f. 3, a-c. 'Porcupine' Exp. 1870: Atl. St. 1. Distribution. Norway, Bay of Biscay ('Travailleur' Exp.) ; 120-664 fms. The late Professor Sars, in his remarks on the occurrence of animal life in the depths of the sea, 1868, referred this species of his to C. cancellatus; but C. alveolus is larger and longer or more oblong, and it has a different sculpture. 8. CHITON RARINOTA1, Jeffreys. (Plate L. fig. 1.) S H E L L oblong-oval, arched, rather thin and glossy : plates broader in the middle than at the sides; lateral areas indistinct: sculpture consisting of white tubercles, which are few in number and irregularly scattered; these are round in the middle of the shell, but become 1 Haying few marks. |