TSOPODS OF NORTH AMERICA. 



189 



niari;iii is crenulato. 'I'he pedimclc of the uropoda lias the inucr part 



produced a littlo boyond the middle of the sixth segment of the 



abdomen. The outer branch is half as wide 



as the im)er branch; it is pointed at the cx- 



tremit3\ The inner ])ranch has the posterior 



extremity ol)li(iuely ti'uncate. Both branches 



are e((ual in length and crenulate; they do not 



extend beyond the tip of the abdomen. The 



first thre(> pairs of leos ai-(^ })rchensilc; the 



^ast four pairs ambulatory. In the first three 



pairs the pi-opodus is furnished with one spin(\ 



the carpus with one, the merus with three. 



Fig. 174.— .T:gA VENTRllSA. 



Leg of second pair. 



JEGA MICROPHTHALMA Dana. 



^Ega microphthalma Dana, Proc. Acad. Nat. Sci. Thila., VII, 1854, p. 176. — 

 Stimpson, Bost. Jour. Nat. Hist., VI, 1857, p. 508. — Richardson, Proc. U. S. 

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

 American Naturalist, XXXIV, 1900, p. 218. 



Locality. — Monterey, California. 



The e^^es are rounded, very small. The body above is bare, smooth. 

 The second pair of antenna?, are rather long; the flagellum is composed 

 of nearly twenty-four articles; the first pair of antenna} 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 verj?^ 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 w^ith 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'"." 



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

 Oculi subrotundi, parvuli. Corpus superficie nudum, hpve. Antenna- externa' 

 longiusi'ul;e, flagello ferine 24 articulato; intern;e basi externarum breviores. Pedes 

 fere nudi; antici breves, articulo 4to, 5-6 dentibus spiniformibus brevissimus infra 

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

 mento postieo triangulato apice rotundato et pubescente, lateribus rectiusculis. 

 Styli caudales spina tenui et longu ramis parce breviore ad basin armati; rainis abdo- 

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

 externo dimidio angustiore, breviter lanceolato. — Long. ^/" 



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

 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. — Daxa, Proc. Acad. Nat. Sci. Phila., VII, 1854, 

 p. 176. 



