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Show 6/4 MR. E. J. M I E R S O N A C O L L E C T I O N O F [June 19, I am in some doubt whether this species be the C. misanthropus of Risso and of M . Milne-Edwards, who apparently copied Risso's description ; but it is almost certainly the species figured under this name by Roux. It differs only in having the tarsi striped with red upon a white instead of a blue ground ; but this latter colour is in all probability evanescent; indeed in one or two specimens from tbe Spanish coast in the collection of the British Museum, some very faint traces of the blue coloration are still discernible. Clibanarius oculatus, Fabricius, as described by M. Milne-Edwards, appears to differ in having the tarsi much shorter than the penultimate joint. They are coloured with longitudinal red and yellow lines. ISOPODA. ARMADILLID^E. Subfamily TYLOSIN^E. TYLOS, Latreille. TYLOS LATREILLEI. Tylos latreillei, Audouin, Expl. d. planches de Savigny, Egypte, Crust, pl. xiii. fig. 1, p. 96 (1809) ; M.-Edw. Hist. Crust, iii. p. 188 (1840) ; Regne Animal de Cuvier, Crust, pl. lxx. bis, fig. 2; Heller, Reise der Novara, Crust, p. 137 (1865) ; Verh. zool.-bot. Gesellsch. Wien, xvi. p. 732(1866). Tylos armadillo, Latr. Regne Animal de Cuvier, iv. p. 142(1829); Guerin-Meneviile, Iconogr. Regne Animal, Crust.p. 35. pl. xxxvi. fig.4. Hab. Odessa. The colour of the specimens in the collection is light brown, length 6| lines, breadth 3 lines. The lateral margins of the coxse and segments of the tail are fringed with very short hairs. This species appears to be common in the Mediterranean region, having been recorded from Egypt, Algeria, Gibraltar, Lesina, &c. The specimens I refer to Tylos latreillei differ from specimens of T. capensis, Krauss, in the British-Museum collection, from Simon's Bay, South Africa, in their much smaller size (the largest specimen of T. capensis is one inch in length), and in the form of the epimeral piece or coxa of the sixth pair of legs; in T. latreillei the posterolateral angle of this joint is rounded; in T. capensis the posterior margin is straight, and forms a right angle with the posterior margin. Moreover in T. capensis the segments are nearly smooth, or only very finely granulated ; in T. latreillei they are rather strongly puuctu-lated and rugose. In both species the postero-lateral angle of the coxa of the last pair of legs is acute. TYLOS GRANULATUS, sp. n. (Plate LXIX. fig. 2.) Convex, coarsely granulated, the granules on the dorsal surface of the body separated by linear smooth intervening spaces ; the process of the epistoma separating the basal joints of the antennse, and the peduncles of the antennse themselves, very strongly granulated. Postero-lateral angles of the first segment of the body strongly flexed backward and acute. Terminal segment of the tail trans- |