NO. 1350. NATURAL HISTORY OF THE ISOPOD A— RICHARDSON. 87 



The uropodu are a pair of double-branched appendages attached to 

 the terininul abdominal segment; the iinier ])ranches are smaller and 

 more slender than the outer branches. 



The pleopoda consist of live pairs of doul)le-branched, elongated 

 lamellic, the inner ])ranches being smaller than the outer a.id directed 

 inward, the outer branches extending be3^ond the margins of the 

 abdomen. 



The incubatory lamella? consist of five pairs of phites affixed to the 

 sides of the thorax, live on either side. They do not completely cover 



b 

 Fig. 92. — Ukobopykus processi. a, dorsal view of female: h, ventral view of same, x l-H. 



the incubator}^ pouch, but a large area remains open, which is normally 

 filled with eggs. 



All seven pairs of legs present. 



Male unknown, 



A single specimen was obtained b}^ the U. S. Fish Commission 

 steamer Albatross off the east coast of South America, lat. N. 

 6° 59' 30", long. W. 84^ -47'. Parasitic on Processa canah'cuJata Leach. 



This genus is very close to Prohopyrus Giard and Bonnier, but dif- 

 fers in having uropoda, which are altogether wanting in that genus. 



Ti/jje.— Cat. No. 29098, U.S.N.M. 



CRYPTIONE ELONGATA Hansen. 



Oryptione elongata Hansen, Bull. Mus. Comp. Zool. Harvard College, XXXI, 

 1897, pp. 112-115, pi. Ill, figs. 5, 5"; pi. iv, figs. 1-1«. —Richardson, Proc. 

 U. S. Nat. Mtiseum, XXI, 1899, p. 869. 



Locality. — Near the Galapagos Islands, in the branchial ca\'ity of 

 Nematocarcinus agasshii Faxon, Avhich occurs as far north as Aca- 

 pulco, Mexico. 



MUNIDION PRINCEPS Hansen. 



Munidion princeps Hansen, liull. Mus. Couip. Zool. Harvard College, XXXI, 

 1897, pp. 115-117, pi. IV, figs. 2-2«; pi. v. fig. 1-1''. 



Local ity. —Cocoii Island, lat. 3 5S'20" N., long. 81^36' W., on 

 Munida refulgciis; off the coast of Ecuador, on M. refulgens Faxon. 

 I>e2)th, 112 fathoms. 



