CIROLANIDJE. 41 



the telson, as well as the uropods, densely beset with plumose 

 setse ; margins of uropods with more numerous spinules than 

 are present in C. borealis. C. borealis has the peraeopods 

 very setose, but in C. Cranchii these setse are absent ; 

 perhaps this deficiency may in some degree be made up by 

 the densely setose margins of the telson and uropods. 



A species confined to our southern coasts, and much more 

 abundant off Devon and Cornwall than C. borealis, which 

 appears to be rare there. 



Falmouth (Leach, type specimen from Cranch) ; Torquay 

 (Stebbing) ; Plymouth (Bate % A. M. ^V.) ; Polperro (A. 

 M. N.). 



Genus 2. CONILERA, Leach. 



Body much elongated ; length about five times that of the 

 greatest breadth. In general structure as Cirolana, but first 

 pleopods much larger than the second, the basal joint and 

 inner branch elongated, and the whole indurated (i. e., not 

 submembranous), and forming as it were an operculum, which 

 closes, as a guard, over the succeeding pairs. 



CONILERA CYLINDRACEA (Montagu). 



1867. Conilera cylindracea, Bate & Westwood, vol. ii. p. 304. 

 1890. Conilera cylindracea, H. J. Hansen, 1. c. p. 358, pi. iv. 



figs. 5-5 c, and pi. v. figs. 1-4 d. 

 1904. Conilera cylindracea, Norman, " British Isopoda of the 



Families JEsidve, &c." Ann. & Mag. Nat. Hist. ser. 7, vol. xiv. 



p. 438. 



The telson tapers to a narrow extremity, and is there 

 serrated. The uropods have the inner branch with the distal 

 half of the outer margin hollowed, so that the extremity is 

 very narrow ; the outer branch is unusually small, narrow, 

 and much shorter than the inner. 



Devon (Montagu); Plymouth and Polperro (A. M. N.). 



Genus 3. EURYDICE, Leach. 



Antennulse with the first joint short and projected forward, 

 so that it is at right angles to the following joints. Antennae 

 with the peduncle consisting of only four joints, the last of 

 which is long. Maxillipeds without clasping spines on the 

 second joint. First pleopods submembranaceous. Basal 

 joint of uropods scarcely produced downwards on the inner 

 side. 



The species of this genus may be distinguished, apart from 

 other characters, by the structure of the telson, of which 



