cbttbtacea. 
101 
Genus, Iphimedia. — BatKke. 
Beit. %ur Fauna. Norw. 
Cephalon produced anteriorly. Eyes two, antennse simple. 
Hands feeble, imperfectly subcbelate. Telson squamose emarg- 
inate. 
IPHEMEDiA OBE8A. — Rathhe. — L.c. nm act. Scop., vol. xx, p. 89, pi. 
Hi, fig. 1 ; Bate and Westwood, l.c., vol. i, p. 219. 
Dredged near Drake’s Island, in Plymouth Sound. 
Gentts, Silgeboegia. — Spence Bate. 
Cat. Brit. Mus., p. 118. 
Cephalon but slightly produced. First pair of antenuEO short, 
having a second appendage, hands large. Telson cleft. 
SiLGEBOBGiA PALLIDA . — Spcncs Bate, Bate and Westwood, p. 203. 
Plymouth Sound. I have no doubt but that it is the same 
Species as Gammarus brevicornis of Bruzelius (Mem. on amphi- 
poda of Skandinavia.) 
Genus, Is^a. — Milne Fdwa/rds. 
Hist, des Crust, t. Hi, p. 26. 
First pair of antennae with secondary branch, hands subchelate, 
^11 the legs smaller but subchelate. Telson cylindrical, single. 
IsiEA Monxagui. — Milne Fdwards, l.c. p. 2Q, pi. xix, fig. 11 . — Bate 
and Westwood, vol. i, p. 216. 
I have frequently taken this species. 
Genus, Ueothob. — Dana. 
Jj. S. Expl. Exp., p. 920. 
Body scarcely compressed. Eyes apart. First pair of antennae 
^ith secondary appendage. First two pair of feet subchelate. 
Telson double. 
Heothoe elegans. — Spence Bate. — Bate and 'Westwood, vol. i, 
p. 200. 
This species is named from its having beautifully variegated 
‘dolours when alive. It was taken from some trawl refuse from 
^he neighbourhood of the Eddystone. 
It bears a generally close resemblance to f7. irrostratus, which 
Dana took in the Zooioo seas. Nor is this the only instance 
