ISOPODS OF NORTH AMERICA. 189 



margin is crenulate. The peduncle of the uropoda has the inner part 

 produced a little beyond the middle of the sixth segment of the 

 abdomen. The outer branch is half as wide 

 as the inner branch; it is pointed at the ex- 

 tremity. The inner branch has the posterior 

 extremity obliquely truncate. Both branches 

 are equal in length and crenulate; they do not 

 extend be3 T ond the tip of the abdomen. The 

 first three pairs of legs are prehensile; the 

 ,last four pairs ambulatory. In the first three 

 pairs the propodus is furnished with one spine, F IG< IU.IEGJL VENTROSA. 

 the carpus with one, the merus with three. LEG OF SECOND PAIR. 



^EGA MICROPHTHALMA Dana. 



^Ega microphthalma DANA, Proc. Acad. Nat. Sci. Phila., VII, 1854, p. 176. 

 STIMPSON, Bost. Jour. Nat. Hist., VI, 1857, p. 508. RICHARDSON, Proc. U. S. 

 Nat. Mus., XXI, 1899, p. 826; Ann. Mag. Nat. Hist. (7), IV, 1899, p. 167; 

 American Naturalist, XXXIV, 1900, p. 218. 



Locality. Monterey, California. 



The eyes are rounded, very small. The body above is bare, smooth. 

 The second pair of antennae are rather long; the flagellum is composed 

 of nearly twenty-four articles; the first pair of antennae are shorter 

 than the peduncle of the second pair. The legs are almost bare, the 

 anterior ones are short, with the fourth article armed on the inferior 

 margin with five to six very short, spine-form teeth; the eight poste- 

 rior ones are short, beset with spines at the apex of the articles. The 

 abdomen is composed of four segments, the posterior segment being 

 triangulate, with apex rounded and pubescent, and with the sides 

 rather straight. The uropoda are armed at the base with a slender 

 and long spine scarcely shorter than the branches; the branches extend 

 very little beyond the abdomen, are furnished with short hairs, the 

 inner branch is wide, with apex obliquely arcuate, the outer branch 

 half as wide as the inner branch, short and lanceolate. Length 6'"/' 



a The above description is adapted from the following one of Dana's: 

 Oculi subrotundi, parvuli. Corpus superficie nudum, laeve. Antenna? externse 

 longiusculse, flagello ferine 24 articulate; internse basi externarum breviores. Pedes 

 fere nudi; antici breves, articulo 4to, 5-6 den ti bus spiniformibus brevissimus infra 

 armato; 8 postici breves, apice articulorum spinulosi. Abdomen 4 articulatum, seg- 

 mento postico triangulate apice rotundato et pubescente, lateribus rectiusculis. 

 Styli caudales spind tenui et longa ramis parce breviore ad basin armati; rainis abdo- 

 men vix superantibus, breviter ciliatis, interne lato, apice oblique leviter arcuato, 

 externo dimidio angustiore, breviter lanceolate. Long. 6/ // 



The six epimerals either side are large, and, excepting the two anterior, they, 

 project behind, beyond the segment to which they belong. The eight hinder legs 

 are naked, excepting the spines at apex and one or two sets of minute spines on the 

 under side of some of the joints. DANA, Proc. Acad. Nat. Sci. Phila., VII, 1854, 

 p. 176. 



