Pacific Coast of Xorth America, 167 



Body more depressed than in ^ya. Superior 

 antennae short, with hasal joints not expanded. 

 Epistome very small and narrow. Maxillipeds 

 with palp composed of only two joints. Anterior 

 pair of legs with propodus more or less expanded, 

 dactylus forming a very large and evenly curved 

 hook. Front covering more or less the peduncle of 

 the first pair of antennas. Flagellum of tirst pair of 

 antennte composed of four to six articles. Abdomen 

 relaxed 7. Rocinela. 



6. ^GA, Leach. 

 Analytical Key to Species of ^-g?).. 



[Dana. 

 8. ./£". microphthalma, 



Eyes very small ; second joint of first pair 



of anteunfe without process at its apex ; 



terminal abdominal segment triangular, 



with rounded apex ; inner branch of uro- 



poda with apex faintly arcuate obliquely . 

 . Eyes almost contiguous; second joint of 



lirst pair of antennae with a process at its 



apex nearly as long as following joint; 



temiinal abdominal segment with its apex 



arcuate-truncate ; inner branch of uropoda 



Bubtruncate 9. JE. Lecontii (Dana). 



8. ^ga microphthalma, Dana. 



JEga micropththalma, Dana, Proc. Acad. Nat. Sci. Philad. vii. 1854, 

 p. 176 ; Stimpson, Journ. Bost. Soc. Xat. Hist. vi. 1857, p. 68. 



Hah. Monterey, California, 



9. ^ga Lecontii (Dana). 



^gacylla Lecontii, Dana, Proc. Acad. Nat. Sci. Philad. vii. 1854, p. 177; 

 Stimpson, Journ. Bost. Soc. Nat. Hist. vi. 1857, p. 69. 



Hah. California. 



Body elongate, oval ; surface smooth ; colour yellow, with 

 a few brown dots ; eyes reddish brown. 



Head with anterior margin bisinuated, the median point 

 separating the basal joints of the first pair of antennze and 

 extending one third the length of these joints. Eyes large, 

 oval, very close together at upper inner angle. First pair 

 of antennae with basal joints very large, dilated; second joint 

 of peduncle dilated, and with a process at its apex extending 

 nearly the length of the third joint ; third joint very narrow, 

 about one third the width of two preceding joints ; flagellum, 

 composed of seven joints, extends the length of the peduncle 

 of second pair of antennse. ISecond pair of antennae, with a 



