PHRYXUS LONGIBRANCHIATUS. 247 



out, the sides dilated laterally, with the anterior lateral 

 angles of each rounded off so that there is a considerable 

 interval between the segments. The tail, on the contrary, 

 has all the joints soldered into a solid piece. This sex is 

 furnished with very short, smooth legs, terminated by a 

 hand much larger than the preceding joints, with a rather 

 strong curved movable finger. 



The female is oblong-ovate, flattened, slightly curved 

 towards the left, so as not to render it very unsym- 

 metrical. The eyes are very minute, the sides of the 

 segments impressed, with the legs inserted within the 

 impressions ; they are strong, with the intermediate joints 

 as large as the hand, and rugose on their underside. 



The tail is about half the length of the body, nar- 

 rower than the terminal segments of the latter, each 

 joint furnished at each side with a pair of elongate fleshy 

 somewhat cylindrical lobes attenuated towards the tip, 

 the terminal segment being furnished, as appears to us, 

 with four of these lobes (one of the four being repre- 

 sented as attached to the left-hand pair of the fifth 

 segment in the right-hand figure of the woodcut illus- 

 trating this species). 



This species bears some resemblance to Bopyrus folio >- 

 sus of Kroyer, Voy. Scandinave, Crust., pi, 29, fig. #, but 

 the rounder form of the pereion, the more elongated tail, 

 and the different form and apparent number of the ap- 

 pendages of the tail, and especially those of the terminal 

 segment, at once distinguish the last-named species from 

 the one before us. Kroyer's specimens, indeed, appear to 

 form a connecting link between Phryxus and Athelges 

 cladophora of Hesse. 



Our specimens of this species were forwarded to us 

 from Shetland, by Mr. J. Gwyn Jeffreys. 



The Rev. A. M. Norman announces it from a specimen 



