672 MR. E. J. MIERS ON A COLLECTION OF [JUHC 19, 



pi. xlvii. figs. 6, 7 (1825); M.-Edw. Hist. Nat. Crust, iii. p. 269 

 (1840); Regne Animal de Cuvier (ed. Crochard), Crust, pi. Ixv. 

 fig. 1 ; Spence Bate and Westwood, Hist. Brit. Sessile-eyed Crust, 

 ii. p. 274, footnote (1868). 



Hub. Peru. 



To this species I refer two specimens in the collection, numbered 

 as coming from Peru (the largest an adult female, length 1 inch .0 

 lines), which agree in every resi)ect with the specimens in the British- 

 Museum collection, described by Leach as Cymothoa astrum, from 

 European seas. Like these specimens they have the anterior lobes 

 of the first segment of the body broad, subtruncate, and produced to 

 a level with the anterior margin of the head, which appears straight 

 in a dorsal view, but is inflexed, and conceals the bases of the 

 superior antennae ; tlie joints of the peduncle slender, not dilated ; 

 the thigh-joint of the fourth pair of legs produced in the form of an 

 acute tubercle, which is most prominent in the younger animal, the 

 same joint of the following legs greatly dilated posteriorly ; the 

 terminal segment transverse, the rami of the uropoda very small, 

 subequal, &c. It is very improbable that the same species should 

 inhabit the seas of Peru and Euro])e ; and I think it safer to conclude, 

 as there are some species in the collection avowedly from the Medi- 

 terraueau, that the label in this instance, as in the case of Armadillo 

 vulgaris, has been misplaced, and that the true habitat of these 

 specimens is European. No particulars are given of the fish on 

 which they were parasitic. 



The West-Indian C dufresnii. Leach, is very nearly allied to this 

 species ; but the anterior lobes of the first segment of the body are 

 not quite so squarely truncate, and the lobe of the thigh-joint of the 

 fourth pair of legs is somewhat less prominent and acute. 



Anilocra, Leach. 

 Anilocra L^vis, sp.ii. (Plate LXVIII. fig. 6.) 



Body regularly convex, oval ; first six segments of the tail of equal 

 width, terminal segment considerably broader. Head small, nar- 

 rowed anteriorly, front narrowed, rounded, inflexed, and concealing 

 the bases of the inner antennae. Eyes black, oblong. First segment 

 of the body with the antero-lateral angles not at all prominent, 

 postero-lateral angles rounded and entire ; second to sixth segments 

 with the posterior margins nearly straight ; seventh segment with 

 the posterior margin regularly excavate, the postero-lateral angle 

 broad, obtuse and rounded. Segments of the tail rounded on the 

 sides, terminal segment with the posterior margin rounded. Epimerae 

 or coxae small, of the second, third, and fourth segments obtuse, of 

 the fifth to seventh segments subacute and somewhat spiniform. 

 Superior (inner) antennse nearly reaching to the anterior margin 

 of the first segment of the body, eight-jointed ; first three joints 

 (peduncle) larger than the succeeding. Inferior antennae 9-jointed, 

 nearly reaching to the posterior margin of the first segment of the 

 body, peduncle five-jointed, the fi.th joint the longest. Rami of the 



