AMPHIPODA AND ISOPODA OF THE FIRTH OF CLYDE. 85 



Idotea parallela, Spence Bate and Westwood, Hist. 

 Brit. Sessile-eyed Crust. (1868), vol. ii., p. 391. 



Habitat. — Dredged between the Tan, Cumbrae, and 

 "Hawk's Neb," Bute, in 50 fathoms, bottom mud. 

 They were only noticed in the dry floatings, but 

 were sufficiently perfect to leave no doubt of the 

 species. Taken also at Falmouth, Mr. Barlee ; Pol- 

 perro, Mr. Loughrin. 



IDOTEA ACUMINATA, Leach. 



Stenosoma acuminatum, Leach, Edin. Encyc, vii.,. 

 p. 433. 



Idotea acuminata, White, Brit. Mus. Cat. Brit. 

 Crust., p. 66. 



Idotea capito, Rathke, Faun. d. Krym., p. 384, pi. 6, 

 f. 7-9 (?). 



Habitat. — Taken among the scrapings of muddy 

 sand-covered stones near low-water, Cumbrae ; and 

 in sandy pools, Kilchattan Bay. It swims or glides 

 smoothly through the water. When hunted it 

 makes little attempt to escape, allowing itself to be 

 drawn up the side of the vessel with a hair-pencil 

 without any struggle to get away. Devonshire, 

 Dr. Leach ; Falmouth, Mr. W. P. Cocks. 



Sub-tribe SPH^ROMIDEA. 



Family SPHMROMIDM. 



Genus Sphceroma, Latreille. 



sphjeroma serratum, Fabricius. 



Oniscus serratus, Fabricius, Mant. Inst., i., p. 242. 



Cymothoa serratum, Fabricius, Ent. Sys., ii., p. 510. 



Sphceroma serrata, Leach, Edin. Enc, vii., p. 405. 



Oniscus globatus, Pallas, Spic, Zool., ix., t. 4, f. 18. 



Sphceroma cinerea, Bosc, Hist. Crust., ii., p. 186. 



Sphceroma serratum, Spence Bate and Westwood, 

 Hist. Brit. Sessile-eyed Crust. (1868), vol. ii., p. 407. 



Habitat. — Taken on Ayr sands, in a pool formed 

 by one of the drain-pipes, about half-tide. 



Bate and Westwood (Brit. Sess.-eyed Crust.) state 

 that "this species lives in numerous societies under 



