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Show 102 DR. GWYN JEFFREYS ON THE MOLLUSCA OF THE [Mar. 6, T. leucophaus of Philippi appears to be a variety. It is strangely omitted in his terrible list of between 400 and 500 so-called species of Trochus given in Kiister's edition of the ' Conchylien-Cabinet' subsequently to the publication of Philippi's work on the Mollusca of the two Sicilies. 20. TROCHUS ADANSONI, (adansonii) Payraudeau. T. adansonii, Payr. Moll. Corse, p. 127, t. vi. f. 7, 8. ' Porcupine'Exp. 1870: Med. St. Algesiras B. A small and non-umbilicate variety. Bistribution. Throughout the Mediterranean, Adriatic, and Black Sea; 1-277i fms. Fossil. Pliocene : Coralline Crag, Italy, Archipelago, and S. Russia. I am inclined to unite with this common species, as synonyms or varieties, T. turbinoides of Deshayes, T. saulcyi of d'Orbigny, T. adriaticus and T. biasoletti of Philippi, T. olivaceus and T. cinerascens of Anton, T. eolybii of Mittre, T. pallidus, lyciacus, and spratti of Forbes, T. albidus of Weinkauff as of Gmelin, T. drepanensis of Brugnone (young), and other species. Brusina refers it to T. ungulatus of D'Eichwald (Zool. spec. Rossiae et Poloniae, 1829) ; but that is a very questionable identification, and the specific name had been previously used by Quoy and Gaimard for another species of Trochus. 21. TROCHUS TUMIDUS, Montagu. T. tumidus, Mont. Test. Brit. p. 280, t. 10. f. 4 : B. C. iii. p. 307 ; v. p. 203, pi. lxii. f. 2. 'Lightning' Exp. St. 7. 'Porcupine' Exp. 1869 : St. L. Foyle. 1879: Atl. 12, Gibraltar B. Bistribution. Iceland, Faroes, and Finmark to Egypt and the Adriatic ; 0-145 fms. Fossil. Pliocene: Red Crag. Post-tertiary: Scandinavia, Scotland, Ireland, and Selsea ; 0-460 ft. Var. minor. T. racketti, Payraudeau, and T. gibbosulus, Danilo and Sandri. This is the usual form in the Mediterranean, although I have the typical form from Corsica. I now believe that it cannot be (as Dillwyn supposed) T. nassai-iensis of Chemnitz or T. pathola-tus of Gmelin, which was said to have derived the first specific name from the Nassau Islands in the Indian Ocean. The fry was figured by Walker as T. fuscus, and described by Macgillivray as Skenea serpuloides. 22. TROCHUS UMBILICATUS, Montagu. T. umbilicatus, Mont. Test. Brit. p. 286 : B. C. iii. p. 312 ; v. p. 203, pi. lxii. f. 4, 4 a. ' Porcupine ' Exp. 1869 : St. Donegal B. 1870 : Atl. Vigo B. Bistribution. Stornoway to Gibraltar, Mogador, G. Lyons, Algiers, G. Naples, and other parts of the Mediterranean as well as |
