4^g CRUSTACEA. 



reaches as far as apex of beak. Second antennae long and slender; 

 flagellum about as long as carapax, naked, joints short; base extends 

 a little beyond line of extremity of beak. Fourth, fifth, and sixth 

 joints of exterior maxillipeds together about as long as second and 

 third. Legs of second, third, and fourth pairs nearly equal, of mode- 

 rate length, pubescent especially towards their extremities. Sixth 

 joint short hirsute, longer than preceding joint ; fifth joint but a little 

 longer than fourth, and each shorter than third. Tarsus terminates 

 in a short acute claw. Fifth pair six-jointed, third joint longest. 



Some of the females, at the time taken (in April), had eggs, and 

 one male had just shed his skin. The female differs but little from 

 the male : the first pair of feet was a little smaller in females. 



This species has been attributed to the shores of Chili. The speci- 

 mens procured were obtained by the author from a fresh-water 

 stream, as above stated. 



Subtribe IX. GALATHEIDEA. 



This subtribe includes the genera Galathea and Grimothea. Leach 

 proposed, also, the genus Munida for certain species related to Galathea 

 which have a tricuspidate front, and more slender legs than in the 

 Galatheaa then known. The slender form of the legs proves not to 

 be distinctive ; for we have a species that should be referred to Gala- 

 thea, in which the legs are peculiarly slender. But the form of the 

 front is a striking characteristic, and it allies the species to the Grimo- 

 theaa. Moreover, we know of no tropical species of the Munidse, and 

 in this respect they are like the Grimothese. We therefore follow 

 Bell* in sustaining Leach's genus, believing it entitled to the rank of 

 a subgenus at least, if not of higher grade. 



* British Crustacea, p. 206. 



