REPORT ON ISOPODS FROM PERU, COLLECTED BY 



DR. R. E. COKER. 



By Harriet Richardson, 



Collaborator, Division of Marine Invertebrates, U. S. National Museum. 



In a collection of isopods sent by Dr. Robert E. Coker to the U. S. 

 National Museum are three species, two of which are new to science. 

 The third species, Meinertia gaudichaudii (Milne Edwards), has pre- 

 viously been recorded from Peruvian shores by Schioedte and Meinert a 

 in 1883. At an earlier date, 1877, Miers, 6 in a paper entitled On a 

 collection of Crustacea, chiefly from South America, described a spe- 

 cies of Anilocra from Peru, and also recorded Cymothoa oestrum as 

 probably occurring there. These are the only marine isopods so far 

 recorded from Peru. 



MEINERTIA GAUDICHAUDII (Milne Edwards). 



Cymothoa gaudichaudii Milne Edwards, Hist. Nat. Crust., vol. 3, 1840, p. 271. 



Ceratothoa rapax Heller, Reise Novara, Crust., 1865, p. 146, fig. 17. 



Ceratothoa gaudichaudii Schicedte and Meinert, Nat. Tidsskr. (3), vol. 13, 1883, 



p. 335, pi. 13, figs. 11-15. 

 Meinertia gaudichaudii Stebbing, Hist. Crust., 1893, p. 345. — Richardson, Proc. 



U. S. Nat. Mus., vol. 21, 1899, p. 829; Ann. Mag. Nat. Hist. (7), vol. 4, 1899, 



p. 171; Proc. Wash. Acad. Sci., vol. 3, 1901, p. 568.— Stebbing, Willey's 



Zool. Results, 1902, p. 643. 



Locality. — Mollendo, Peru. From the mouth of a large "Jurel." 



Distribution. — From Mazatlan, Mexico, to Chile ; Galapagos Islands. 

 Also recorded from the Louisiade Archipelago, New Guinea. 



Description. — Body elongate, nearly three times as long as broad, 

 16 mm.: 45 mm. 



Head nearly twice as wide as long, 4 mm.: 7 mm., somewhat tri- 

 angular in shape, with apex obtuse. The head is deeply set in the 

 first thoracic segment, the narrow and acute antero-lateral angles of 

 which extend half the length of the head. Eyes small, distinct, irreg- 

 ular in outline, but inclined to be square, and placed at the sides of 

 the head, a little below the middle. 



a Nat. Tidsskr. (3), vol. 13, 1883, p. 335, pi. 13, figs. 11-15. 

 &Proc. Zool. Soc. London, 1877, p. 671. 



Proceedings U. S. National Museum, Vol. 38, No. 1729. 



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