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 léft, 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., pl. 29, fig. 2, 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 Phrywus 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 
