CRUSTACEA . 



101 



Genus, Iphimedia. — Rathke. 

 Beit. %ur Fauna, Norw. 



Cephalon produced anteriorly. Eyes two, antennae simple. 

 Hands feeble, imperfectly subchelate. Telson squamose emarg- 

 inate. 



Jphemedia obesa. — Ratlike. — L.c. nov act. Scop., vol. xx, p. 89, pi. 

 Hi, fig. 1 ; Bate and Westwood, I.e., vol. i, p. 219. 

 Dredged near Drake's Island, in Plymouth Sound. 



Genus, Silgeborgia. — Spence Bate. 

 Cat. Brit. Mus., p. 118. 



Cephalon but slightly produced. First pair of antennae short, 

 having a second appendage, hands large. Telson cleft. 

 Silgeborgia pallida. — Spence 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^ea. — Milne Edwards. 



Hist, des Crust, t. Hi, p. 26. 



First pair of antennae with secondary branch, hands subchelate, 

 all the legs smaller but subchelate. Telson cylindrical, single. 



Is^ea Montague — Milne Edwards, l.c. p. 26, pi. xix, fig. 11. — Bate 

 and Westwood, vol. i, p. 215. 

 I have frequently taken this species. 



Genus, Urothoe. — Dana. 

 L. 8. Expl. Exp., p. 920. 



Body scarcely compressed. Eyes apart. First pair of antennae 

 with secondary appendage. First two pair of feet subchelate. 

 TeJson double. 



Urothoe elegans. — Spence Bate. — Bate and Westwood, vol. i, 

 p. 200. 



This species is named from its having beautifully variegated 

 colours when alive. It was taken from some trawl refuse from 

 the neighbourhood of the Eddystone. 



It bears a generally close resemblance to U. irrostratus, which 

 Mr. Dana took in the Zooloo seas. Nor is this the only instance 



