i'.S IsOFOPA. 



which the outer margin is rather suddenly contracted by a 

 shoulder but without any notch ; extremity directed forwards, 

 inner margin minutely crenulated, crenulations sometimes so 

 obscure as scarcely to be visible. The second feet are nearly 

 as in G. maxillaris; the propodos similarly bears two small 

 spines, and the three preceding joints have nodules, which 

 are rather more developed than in G. maxillaris. The 

 pleopods (fig. 2) terminate in plumose setae and are thus 

 adapted for swimming. Length 3*75 mm. 



The female is much more elongated and less broad than in 

 the former species, the length being about three times the 



freatest breadth (see the figures of Bate & Westwood and of 

 ars). The length of the cephalosome (fig. 5) considerably 

 exceeds the breadth. 



Near Starcross, in 5 fathoms, 1884 (A. M. 3 T .). 



Fain. 3. JEaiD M. 



STROMII, Liitken. (PI. VIII. figs. 9, 10.) 



1897. JEya Stromii, G. 0. Sars, Crust. Norway, Jsopoda, p. 60, 

 pi. xxv. fig. 2. 



The jEga bicarinata of Leach and of Bate and Westwood, 

 and the figure given by the latter authors, which was 

 taken from Leach's type from an unknown locality, are the 

 JEga rosacea of Risso. That species is well known in the 

 Mediterranean. The British specimens, so far as they are 

 known to us, are referable to another species, which has much 

 larger eyes. viz. ^Ega Stromii of Liitken ( ^Ega monophtJialma 

 var., Johnston = jEga bicarinata, Rathke). It is probable 

 that the JEga obtained by Spence Bate "by trawling in 

 Plymouth Harbour at the beginning of February " (Bate & 

 Westwood, vol. ii. p. 280) was not *sEga bicarinata of Leach, 

 biit ^E(/a Stromii, Liitken. We figure the head and telson 

 of the latter species ; and for further notes on the subject, 

 Norman, " Brit. Isopod:i of the Families ^Egidse, Girolanidse, 

 Idoteidse, and Arcturidse/' Ann. & Mag. Nat. Hist. ser. 7, 

 vol. xiv. 1904, p. 433, may be consulted. 



ROCINELA DANMONIENSIS, Leach. (PI. III. figs. 6-8.) 



1867. Rocinela damnoniensis, Bate & AVestwood, vol. ii. p. 291. 

 1897. Rocinela damnoniensis, G. C). Sars, Crust. Norway, Isopoda, 

 p. 65, pi. xxvii. 



It is Acherusia rotundicauda, Lilljeborg, and jEga nasuta, 

 Norman. The cephalosome is subtriangular ; the eyes very 

 large and almost touching each other on the centre of the 



