1877.] CRUSTACEA, CHIEFLY FROM SOrTH AMERICA. 673 



uropoda lamellate, compressed, oval, the inner slightly the larger. 

 Length 1 inch 7 lines, breadth 7^ lines. 



Had. Martinique ; Peru. 



A specimen from each locality is in the collection. 



This species appears to be nearly allied to, but distinct from J. 

 laticauda, Milne-Edwards (Hist. Nat. Crust, iii. p. 2.t9, 1840), from 

 the West Indies, and A~ mexicuna, 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 epimerae also, in this species are uniform), from 

 A. laticauda in the much longer internal antennte 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. 



DEC APOD A. 



AcANTHONYX, Latr. 



The following is a species hitherto only known by the name (with- 

 out descrij)tion) applied to it by White in the ' List of Crustacea in 

 the Collection of the British Museum,' p. II (1847). 



AcANTHONYX ELONGATUS. (Plate LXIX. fig. I.) 



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 equi- 

 distant from the prominent obtuse anterior and the obtusely tri- 

 angular 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 com- 

 pressed, fingers, when closed, meeting only at tips. Ambulatory 

 legs wanting. Abdomen (of male) narrow, six-joiuted, the fourth 

 and fifth joints coalescent. Length to end of rostrum, I inch I line. 



Hab. Red Sea. 



A single specimen is in the British- Museum collection. 



Anomura. 

 Clibanarius, Dana. 

 Clibanarius misanthropus. 



Pagurus misanthrojms, Risso, Crust, des Environs de Nice, p. 56 

 (181G); Hist. Nat. Eur. me'rid. v. p. 41 (1826) ; Roux, Crust, de 

 la Mediterranee, 3" hvr.pl. xiv. fig. 1, 2 (1828) ; M.-Edw. Hist. Nat. 

 Crust, ii. p. 228 (1837). 



Pagurus lahiUardieri, Audouin, Expl. d. Planches de Savigny, 

 Egypte, Crust, pi. ix. fig. 2, p. 89 (1809). 



Hub. — ? 



A good series of specimens is in the collection. 



