OCR Text |
Show 1877.] CRUSTACEA, CHIEFLY FROM SOUTH AMERICA. 673 uropoda lamellate, compressed, oval, the inner slightly the larger. Length 1 inch 7 lines, breadth 7-| lines. Hab. Martinique ; Peru. A specimen from each locality is in the collection. This species appears to be nearly allied to, but distinct from A. laticauda, Milne-Edwards (Hist. Nat. Crust, iii. p. 259, 1840), from the West Indies, and A. mexicana, De Saussure (Mem. Soc. Phys. et Hist. Nat. Geneve, xiv. part 2, p. 484, 1858), from the Gulf of Mexico. From the latter species it differs in the form of the first segment of the body, which in A. mexicana has the latero-anterior margins provided with a small tubercle, and the latero-posterior margins notched (the epimerse also, in this species are uniform), from A. laticauda in the much longer internal antennse and in the length of the rami of the uropoda, the inner being equal to or shorter than the outer in A. laticauda. Old-world Species. DECAPODA. ACANTHONYX, Latr. The following is a species hitherto only known by the name (without description) applied to it by White in the ** List of Crustacea in the Collection of the British Museum,' p. 11 (1847). ACANTHONYX ELONGATUS. (Plate LXIX. fig. 1.) Carapace smooth, without hairs. Gastric and genital regions convex, gastric region with two strong tubercles, lateral margins slightly excavated, with the median tooth obscure and nearly equidistant from the prominent obtuse anterior and the obtusely triangular posterior tooth. Front and rostrum obliquely deflexed, with the supraocular and rostral spines prominent. Anterior legs (in the male) very much enlarged, wrist obscurely ridged, hand compressed, fingers, when closed, meeting only at tips. Ambulatory legs wanting. Abdomen (of male) narrow, six-jointed, the fourth and fifth joints coalescent. Length to end of rostrum, 1 inch 1 line. Hab. Red Sea. A single specimen is in the British-Museum collection. ANOMURA. CLIBANARIUS, Dana. CLIBANARIUS MISANTHROPUS. Pagurus misanthropus, Risso, Crust, des Environs de Nice, p. 56 (1816); Hist. Nat. Eur. me'rid. v. p. 41 (1826) ; Roux, Crust, de la Mediterranee, 3elivr. pl. xiv. fig. 1, 2 (1828) ; M.-Edw. Hist. Nat. Crust, ii. p. 228(1837). Pagurus labillardieri, Audouin, Expl. d. Planches de Savigny, Egypte, Crust, pl. ix. fig. 2, p. 89 (1809). Hab. - ? A good series of specimens is in the collection. |