56 TRANSACTIONS, NATURAL HISTORY SOCIETY OF GLASGOW. 



that they kill and devour one another; and, as they 

 live gregariously, it is not at all likely that such 

 could be the case. 



Since the above was written, I have taken this 

 species at Cardross, between tide, in brackish water. 



gammakus pulex, Pennant. 



Squille Puce, De Geer, Mem. pour servir a l'Hist. 

 d'Insectes (1752), t. vii., p. 525, pi. 33. 



Cancer pulex, Pennant, Brit. Zool. (1776), vol. iv., 

 p. 17. 



Gammarus pulex, Desmarest, Consid. sur les Crust. 

 (1825), p. 266, t. 45, fig. 8. 



Gammarus fluviatilis, Milne Edwards, Hist. Nat. 

 des Crust. (1840), t. hi., p. 45. 



Habitat. — Common in slow-running streams, or in 

 ditches well filled with vegetation. 



Genus MiERA, Leach. 

 m^ra loreni, Bruzelius. 



Gammarus Loreni, Bruzelius, Skand. Amphip. Gamm. 

 (1859), p. 59, fig. 9. 



Moera Loreni, Spence Bate, Cat. Amphip. Crust. Brit. 

 Mus. (1862), p. 193, pi. xxxv, fig. 1. 



Habitat. — Taken off the light-house, Little Cum- 

 brae, in 55 to 60 fathoms, and off the Isle of Arran, 

 in 80 fathoms, bottom soft mud. Most of this genus, 

 taken from a depth of from 60 to 80 fathoms, were 

 pale in colour, and soon became white when put in 

 spirits. Depth, however, does not always affect the 

 colour of the animals, as some of the Paloemonidai 

 brought up in the same hauls were bright red. 



mjera semiserrata, Spence Bate. 



Megamaira semiserrata, Spence Bate, Cat. Amph. 

 Brit. Mus., p. 226, pi. xxxix., fig. 6. 



Habitat. — Dredged on two different occasions at 

 the Tan, C umbrae, in 6 to 7 fathoms, bottom Melo- 

 besia ; and off the Allans in 6 fathoms, bottom stony 

 mud. Taken near Mallard Buoy, in Plymouth Sound 

 by Bate and Westwood. 



