116 Mr. E. J. Miers on new Species of Crustacea. 



punctures become larger and more numerous upon the segments 

 of the pleon, especially upon the last segment. Eyes large, 

 placed laterally. Each of the seven segments of the pereion 

 with a faint impressed transverse line crossing it at about the 

 middle ; the sixth segment the largest. Coxas somewhat acute 

 and produced posteriorly, and marked with two oblique raised 

 lines. Pleon composed of six segments, of which five are 

 very short and subequal ; the sixth and last about three fourths 

 as long as broad at the base, with the sides converging poste- 

 riorly, truncate and slightly emarginate at the extremity, with 

 a somewhat obscure, smooth, central longitudinal carina, which 

 terminates before reaching the posterior margin, and a slight 

 depression on either side of it near the base of the segment. 

 Rami of the lateral appendages ciliate, not reaching to the 

 extremity of the segment, subequal ; the outer suboval and 

 rounded at the extremity, the inner triangular, with the ex- 

 tremity broad and truncate. 



Length of largest specimen 2\ inches. 



Hab. Kerguelen's Land {coll. Brit. Mus.). 



This species resembles JEga serripes, M.-Edw., from the 

 South Seas, in its truncate caudal segment, but differs in 

 having the posterior margin of the thighs entire, and in the 

 caudal appendages being shorter than the segment and not 

 reaching to its posterior margin. 



Serolis septemcarinata, n. sp. 

 Serolis quadricarinata, White, List Crust. Brit. Mus. p. 106, sine descr. 

 (1847). 



Depressed and rugose, especially towards the lateral margins 

 of the segments. Segments of the pereion acute at the posterior 

 angle ; the fifth and sixth segments and the penultimate seg- 

 ment of the pleon produced backward, so that the extremity 

 of the penultimate segment projects considerably beyond the 

 base of the terminal segment of the pleon. Terminal segment 

 of the pleon narrowed posteriorly, with the sides slightly con- 

 cave, with a shallow emargination at its extremity, and with 

 three straight longitudinal carinas on either side of the central 

 carina, the two inner of which are somewhat thickened poste- 

 riorly and terminate before reaching the margin of the segment. 

 Rami of the lateral appendages of the pleon short, subacute 

 at the extremity, the inner rather larger than the outer. 



Length of largest specimen \ inch. 



Hab. Crozet Island {Lieut. A. Smith, B.N., Brit. Mus.). 



The two inner of the lateral ridges on the last segment, on 

 each side of the central carina, are more prominent than the 



