CALLIOPIID^E. 75 



APHEEUSA CIRRUS (Bate). 



1862. Pherusa cirrus, Bate, Cat. Amphip. Brit. Mus. p. 143, pi. 



xxvii. fig. 6. 

 1862. Pherusa bicuspis, Bate & Westwood, vol. 5. p. 253 (not Am- 



phithoe bicuspis, Kroyer). 

 1870. Halirages borea/is, Boeck, p. 116. 

 1893. Apherusa borealis, Sars, p. 441, pi. civ. fig. 2. 



Paignton and Salcombe (Stebbing); Exniouth, Salcombe, 

 Plymouth, Scilly (A.M.N.)-, Falmouth (W. Webster, fide 

 Bate). 



APHERUSA OVALIPES, n. sp. (PL VII f. figs. 1-8.) 



The first two segments of the metasome (rig. 5) with 

 conspicuous backward-directed, acute-pointed, distal pro- 

 jections, and that of the first segment overhangs fully 

 half of the second. First segment of the urosome with 

 the dorsal sulcus well marked. Cephalon equal in length 

 to the combined length of the three following segments ; 

 rostral projection distinct ; postantennal corner projected in 

 minute equiangular form. First pair of epimeral plates 

 of metasome with a small inferodistal point : second with 

 the point developed into a spine-point ; third (fig. 6) with 

 the spine-point in the same position, of larger size, above 

 it the lower half of the hind margin is straight and serrated; 

 serrations about eight, pointing upwards, with a minute 

 cilium in each serration; upper part of hind margin regularly 

 and slightly concave (without the sulcus of such species as 

 A. bispinosa and ^1. megalops). Eye large and round. The 

 antennae of both pairs long and slender, closely resembling 

 those of A. Clevei, the peduncle of the upper reaching to the 

 end of the penultimate joint of that of the lower ; in the 

 female the peduncle is very sparingly ciliated ; in the male 

 the approximating faces of the peduncles bear series of 

 fascicles of short stiff sensory bristles. Grnathopods of quite 

 different form from those of allied species except A. Clevei ; 

 first pair (fig. 1) rather larger than the second (tig. '!); both 

 pairs in male slightly larger than those of female, in other 

 respects there is no marked difference. The hand exceeds 

 in length that of the combined three preceding joints; the 

 form is long ovate, widest at the middle ; upper margin only 

 slightly curved, lower well arched ; the nail, which bears a 

 cilium near its point, when reflexed reaches about half-way 

 along the hinder margin, which margin where thus closed over 

 by the nail is beset with numerous slender spines, while two or 

 three of larger si/ce define the proximal end of what con- 



