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Show 656 MR. E. J. MIERS ON A COLLECTION OF [June 19, this is scarcely apparent in the larger specimen from Martinique, and may also be due to the immaturity of the specimen examined by him. N. anceps is nearly allied to N. hastatus, from the Mediterranean, from which it differs in the shorter, more obtuse median frontal teeth, &c, and to N. laevis, A. Milne-Edwards, from the Indian Ocean, in which the carapace is nearly smooth, and the median teeth of the front slightly prominent and acute. Lupea exasperata, Gerstaecker, Archiv f. Nat. xxii. p. 129 (1856), from Puerto Cabello, has the median teeth of the front separated by a deeper fissure, and the last spine of the antero-lateral margins but little longer than the preceding. L. pudica, Gerst. /. c. p. 130, from the coast of Brazil, has the upper surface of the carapace nearly smooth, and glabrous; the arm blunt and without a spine at the distal extremity of its posterior margin. This species has been united by von Martens, Archiv f. Nat. xxxviii. p. 95 (1872), with Lupea forceps, Fabricius, on the authority of a large series of specimens from Cuba, in which von Martens observed a great increase of length in the anterior legs as the animal increased in age. I believe it to be quite impossible that L. anceps can be identical with L. forceps, as described and figured by Leach, Zool. Miscell. i. pl. liv. (1814), and Alph. Milne-Edwards, Arch. Mus. Hist. Nat. x. p. 352, pl. xxviii. fig. 1 (1861). In Leach's typical specimen of L. forceps in the British-Museum collection, not only are the fingers very slender and more than three times the length of the palm, but the carapace is strongly granulated, the frontal teeth acute and separated at base by wide intervening spaces; there is a very deep fissure in the middle of the upper orbital margin (a mere notch in L. anceps), five spines upon the anterior margin of the arm in N. anceps, seven in L. forceps, the meros joint of the fifth pair of legs without spines in L. anceps, with two spines in L. forceps, &c. Lupa bellicosa, Stimpson, quoted by M. A. Milne-Edwards, I. c, as a synonym of this species, is the Callinectes bellicosus of Ordway, and has probably nothing to do with N. anceps. HEPATUS, Latreille. H E P A T U S CHILENSIS. Hepatus chiliensis, M.-Edwards, Hist. Nat. Crust, ii. p. 117 (1837). Hepatus chilensis, M.-Edwards and Lucas, in D'Orbigny, Voy. Amerique merid. vi. part i. Crust, p. 28, pl. xiv. fig. 1 (1843); Nicolet, in Gay, Historia de Chile, Zool. iii. Crust, p. 174 (1849); Dana, U.S. Explor. Exped. xiii. Crust, part i. p. 395, pl. xxv. fig. 3 (1852); Kinahan, Journ. Roy. Dublin Soc. i. p. 345 (1858); Heller, Reise der Novara, Crust, p. 70 (1865). Hab. Peru (Jelski). Two specimens (male and female) are in the collection. This species appears to be subject to considerable variation in the sculpture of the antero-lateral margins and the coloration of the |