M A I I D E A. 



105 





edges are hairy, and in the specimen, the hairs are longer than the 

 breadth of the beak. The second post-orbital spine is prominent and 

 obtuse; the first quite short and obtuse. The carapax has two spines 

 on the medial region, one on the cardiac region, one either side in the 

 same line nearly on the postero-lateral region, and another, forward 

 of this, a little more outward ; also one on the middle of posterior 

 margin. The lateral portions of the carapax are somewhat hairy. 



The immoveable basal joint of the outer antennae has no spinous 

 process on outer side, near base, and no distinct tooth just posterior. 



The first pair of feet is about as long as the carapax. The others 

 are much longer and more slender. The arm has two small tubercles 

 on the upper side; the next joint a few more; the hand is linear and 

 rather thin, with the upper and under margins hairy. The following 

 legs have the thigh nearly cylindrical, with a few hairs above and 

 below; the fifth joint is longer than the fourth. 



The abdomen of the male is narrow, with the last joint subtri- 

 angular. 



Eurypodius Latreillii, Guerjn, Mem. du Mus., xvi. pi. 14, and Iconogr. Crust., pi. 

 11, f. 1. 



, Edwards, Crust., i. 284. 



, Voyage de la Coquille, pi. 2, f. 1. This figure represents the first post-orbital 



spine of nearly the same size as the first; while in Guerin's figure and our 

 specimens it is very short, and the second very much longer. 



Genus OREGONIA, Dana. 



Bostro, antennis, oculis, spind postorbitali pedibusque elongatis Eury- 

 podio affinis. Pedes tenues, octo postici articulum quintum aliosqive 

 subcylindrici, nunquam compressi. 



Resembling Eurypodius in beak, antennae, eyes, post-orbital spine, 

 and feet. Feet slender, the anterior little shorter than second 

 pair, the eight posterior pairs, with the fifth joint, as well as others, 

 cylindrical. 



The main distinction between this genus and Eurypodius, consists 

 in the fact, that the fifth joint of the eight posterior legs is slender 



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