CRUSTACEA. 



COROP^SIIDES. 



Geistits, Cyetophium. — Dana. 

 U. S. Ezpl. Exp., p. 839. 



Head sub quadrate. Body broad, narrowing posteriorly. Eyes 

 prominent. Antennae subpediform. Hands subchelate. Second 

 much, larger than first. Last pair of tail appendages rudimentary. 

 Telson squamiferous. 



We consider that Dana's genus of PlatopMum is identical with 

 this. 



This species has been taken with the dredge off Falmouth, 

 and obtained on the shore of St. Michael's Mount. 



Genus, Coeophium. — Latrielle. 

 Gen. Crust., i, p. 58 — Bate and Westwood, p. 492. 



Body not compressed. Eyes small. First antennae multarti- 

 culate. Second subpediform. First hand subchelate, second 

 simple. 



CoBOPHiUM LONGicoRNE. — Latr., Gen. Crust, et Ent., I, p. 89. — 

 Bate and Westwood, p. 493. 



This species may probably be found all round the British 

 coast. Quatrefages, in his '' Eambles of a Naturalist," says that 

 " they come from the open sea in April, in myriads, to wage war 

 with the annelids, which they entirely destroy before the end of 

 May. They then attack the mollusca and fish, all through the 

 summer, and disappear in a single night about the end of 

 October." 



Mr. Walker, of Chester, tried several experiments with this 

 animal, by keeiDing it in small vessels with some nereid annelids, 

 but they appeared to dwell together in peace. 



Coeophium bonelli. — Milne Edivards, Sist. des Crust., t. in, p. 

 67. — Bate and Westwood, p. 497. 

 This species has also been taken in Plymouth Sound. 



GSELTJRIBM. 



Genus, Cheluea. — PMlippi. 

 In Wiegman's Arcliit., 1839. — Bate and Westwood, p. 502. 



Body not compressed. First antennae short, second long, robust, 

 flagellum multarticulate and spatuliform. Hands chelate, Tel- 

 son single. 



