NO. 1729. 



ISOPODIS FROM PERU— RICHARDSON. 



85 



rounded. Near the base on either side is a small notch probably 

 indicating the first fused segment. There are no pleopods or uropods. 



One male and one female were collected at Matapalo (near Capon), 

 Peru. They were taken from the branchial cavity of Petrolisthes 

 armatus (Gibbes) which was found in oyster beds. 



Type-specimen.— Cat. No. 40133, U.S.N.M. 



ADDITIONAL ISOPODS KNOWN FROM PERU. 



ANILOCRA L^EVIS Miers. 



Anilocra L&vis Miers, Proc. Zool. Soc. London, 1877, p. 672, pi. 68, fig. 6. 

 Localities. — Martinique ; Peru. 



CYMOTHOA (ESTRUM (Linnaeus). 



(?) Oniscus cestrum Linnaeus, Syst. Nat., 12th ed., 1766, p. 1059. — Fabricius, 

 Syst. Ent., 1775, p. 294. 



Cymothoa cestrum Fabricius, Syst. Ent., vol. 2, 1793, p. 505. — Leach, Trans. 

 Linn. Soc, vol. 11, 1815, p. 372. — Desmarest, Cons. Gen. Crust., 1825, 

 p. 309, pi. 47, figs. 6, 7.— Milne Edwards, Hist. Nat. Crust., vol. 3, 1840, 

 p. 269; Regne Anim. Cuvier (ed. Croehard), Crust., pi. 45, fig. 1. — Spence 

 Bate and Westwood, Hist. Brit. Sessile-eyed Crust., 1868, vol. 2, p. 274, 

 footnote. — Miers, Proc. Zool. Soc. London, 1877, p. 671. — Schicedte *»>nd 

 Meinert, Nat. Tidsskr. (3), vol. 14, 1883, p. 271, pi. 8, figs. 5-6. 



Fig. G. — Cymothoa cestrum (after Schicedte and Meinert). a, young of the second stage 



(ENLARGED), b, YOUNG OF THE FIRST STAGE (ENLARGED). C, LATERAL VIEW OF THORAX OF ADULT 

 FEMALE (REDUCED), d ,■ ADULT MALE (ENLARGED). f , ADULT FEMALE (REDUCED). /, ADULT FEMALE 

 (REDUCED). 



Localities. — Virginia, southward throughout the Gulf of Mexico and 

 Caribbean Sea; Peru (according to Miers). Parasitic on fish. 



