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Show 134 MR. E. J. MIERS O N CRUSTACEANS [Feb. 20, ETISUS DENTATUS. Cancer dentatus, Herbst, Naturg. Krabben u. Krebse, i. p. 186, pl, xi. fig. 66 (1790). Etisus dentatus, M.-Edw. Hist. Nat. Crust, i. p. 411 (1834). One specimen, a female with ova, is in the collection. This is another widely distributed species. Specimens are in the British- Museum collection from the Mauritius, Torres Straits, and New Caledonia. ACTCEODES TOMENTOSUS. Zozymus tomentosus, M.-Edw. Hist. Nat. Crust, i. p. 385 (1834); Regne Animal de Cuvier, Atlas, pl. xi. bis, fig. 2. Actceodes tomentosus, Dana, U.S. Expl. Exp. xiii. Crust, i. p. 197 (1852). Actcea tomentosa, A. M.-Edw., Nouv. Archiv. Mus. Hist. Nat. i. p. 262(1865). Four specimens of this species, all of them males and three of large size, were collected. Length of largest specimen | inch, greatest breadth I*- inch. Like most of the species collected, this is a very common Indo-Pacific species. I may here observe that M . A. Milne-Edwards, in his revision of the Cancridse (Nouv. Arch. Mus. Hist. Nat. i. p. 259, 1865), has united the genera Actcea and Actceodes, not considering the excavate or non-excavate finger-tips a character of generic importance. Dana, on the other hand (Expl. Exp. Crust, i. p. 147, 1852), has based his subfamilies Xanthinae and Chlorodinse upon this very peculiarity of structure, and has shown that the genera may be arranged in each division in two parallel series. I am inclined to think the latter the most natural and convenient arrangement of the genera; but it will probably be necessary, if Dana's system be adopted, to unite the subfamilies Cancrinee and Xanthinee, as the genus Cancer bears nearly the same relation to Etisus in the ChlorodhiEe, as Liomera to Carpi^ lodes, or Xantho to Leptodius. LEPTODIUS EXARATUS, var. SANGUINEUS, Milne-Edwards. 1 Chlorodius sanguineus, Milne-Edwards, Hist. Nat. Crust i p 402 (1834) ; Dana, U.S. Expl. Exp. xiii. Crust, i. p. 207, pl. xi*. fig. 11 (1852). r Chlorodius nodosus, Randall, Journ. Ac. Nat. Sci. Phil. p. Ill (1839); Dana, U.S. Expl. Exp. xiii. Crust, i. p. 210, pl. xi fie 14 (1852). &' ? Leptodius sanguineus, A. M.-Edw, Nouv. Archiv Mus Hist Nat. ix. p. 224 (1873). Five males and one female specimen of a Leptodius were collected which I should have referred, without any doubt, to the Chlorodius sanguineus of Milne-Edwards, were it not that M . Alphonse Milne- Edwards in his description says : - " Jamais il n'y a de tubercules sur les parties saillantes." In the specimens before me there is a slight tubercle on the carapace behind each tooth of the antero- |