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Show 054 MR. E. J. MIERS ON A COLLECTION OF [June 19, A N O M U R A. Clibanarius cayennensis, n. Cayenne. Clibanarius lordii, n. Vancouver Island. carnescens, n. „ isochirus. - ? speciosus, n. Brazil. pilosimanus, - ? MACRURA. Palsemon nattereri, Heller. Guiana. Palsemon gaudichaudii, M.-Edw. Peru. brasiliensis, „ „ Euryrhynchus wrzesniowskii, n. jelskii, n. „ Cayenne. ISOPODA. Armadillidium caslatum, n. Cayenne. Porcellio (Porcelloides) flavo-vittata.n. Armadillo vulgaris, Latr. ,, Cayenne. Cubaris affinis, n. „ ( ) aztecus, Saussure. Peru. gigas, n. Nicaragua. Philougria nitida, n. Peru, Guiana. Porcellio cayennensis, n. Cayenne. Lygia baudiniana, M.-Edw. Cayenne. (Porcelloides) jelskii, n. Peru, Cymothoa oestrum, L. Peru. Guiana. Anilocra lsevis, n. Martinique, Peru. Old-world Species. DECAPODA. BRACHYURA. Acanthonyx elongatus, Red Sea. A N O M U R A. Clibanarius misanthropus, Bisso. ISOPODA. Tylos latreillei, Audouin. Odessa. Porcellio hispida, n. Mongolia. granulatus, n. Japan, Borneo. Lironeca daurica, n. Dauria. Armadillidium pustulatum, Bum. Lironeca laticauda, n. Mantchuria. Moldavia. Anilocra trichiura, Mauritius. Porcellio swammerdamii, Audouin, Egypt. New-world Species. DECAPODA. BRACHYURA. ACANTHONYX, Latreille. ACANTHONYX PETIVERII ? Cancer muricatus compressus, Petiver, Pterigraphia Americana, pl. xx. fig. 8. Acanthonyx petiverii, M.-Edw. Hist. Nat. Crust, i. p. 543 (1834) ; Dana, U.S. Expl. Exp. xiii. Crust, (part i.), p. 128, pl. v. fig. 6 (1852); Guerin-Meneviile in Ramon de la Sagra, Histoire de l'lsle de Cuba, Crust, p. xxvii (1857); v. Martens, Archiv f. Nat. xxxviii. p. 85 (1872). Hab. Peru. In all the specimens the teeth of the lateral margins are clothed with tufts of short hairs. In one or two specimens there are two small tufts upon the gastric region ; in the others these are entirely absent. The median tooth of the lateral margin is always much nearer to the posterior than to the anterior tooth ; the anterior tooth is somewhat less prominent in the youngest specimens. In the males |