52 TRANSACTIONS, NATURAL HISTORY SOCIETY OF GLASGOW. 



and at other times free. It appears, therefore, not 

 to be confined to one species of starfish. In regard 

 to those found free, it is a question whether they 

 may not have been detached from the starfish by 

 the rubbing and rolling in the dredge, or whether 

 they may not seek the starfish for shelter or for 

 food. The eyes of this species are small, round, 

 and white, with about ten to twelve red dots. 



Bate and Westwood say of this species that it 

 " may be readily mistaken for M. obtusata, of which, 

 indeed, we are sometimes inclined to think that it 

 may turn out to be a variety; an examination of a 

 greater number of individuals is, however, necessary 

 to determine this point." It may be remarked that 

 the fact of this animal living among the suckers of 

 starfishes points to a peculiarity in its habits not 

 recorded of M. obtusata. 



This species has been taken in Plymouth Sound 

 by the authors of the Brit. Sessile-eyed Crust, and 

 on the coast of Banff by Mr. Edward. 



melita alderi, Spence Bate. 



Megamcera Alderia, Spence Bate, Cat. Amph. Brit. 

 Mus., p. 228, pi. xl., fig. 1. 



Habitat, — Dredged between the Allans, Millport 

 Bay, in 2 fathoms, bottom weedy gravel and sand. 

 This species has also been taken on the Northumber- 

 land coast by Mr. Alder, and at Banff by Mr. Edward. 



Genus Gammaropsis, Lilljeborg. 



GAMMAROPSIS ERYTHROPHTHALMUS, Lilljeborg. 



Gammarus ( Ga?nmaropsis ) erythro-phthalmus, Lillje- 

 borg, Kgl. Vet.-Akad. Handl. (1853), p. 455. 



Eurystheus tridentatus, Spence Bate, Brit. Assoc. 

 Rep., 1855, p. 58. 



Autonoe erythrophthalma, Bruzelius, Skand. Amphip. 

 Gamm. (1859), p. 27. 



Eurystheus erythroplithalmus, Spence Bate, Cat. 

 Amph. Crust. Brit. Mus. (1862), p. 196, pi. xxxv., 

 fig. 7. 



