68 TRANSACTIONS, NATURAL HISTORY SOCIETY OF GLASGOW. 



the difference of the size of their perforations was 

 not in this case satisfactorily discernible. In the 

 piece of wood referred to, the two animals appeared 

 to be equally abundant ; but there did not appear 

 to be two sets of perforations of different sizes, one 

 running deep into the interior of the wood, and the 

 other appearing ploughed up rather than burrowed. 



Family HYPERIIDM. 



Genus Hypeeia, Latreille. 



hyperia medusarum, O. F. Miiller (1776). 



Cancer medusarum, Miiller, Zool. Dan. Prodromus, 

 2355, p. 148. 



Gammarus medusarum, Fabricius, Reise nach Nor- 

 wegen (1729), pp. 326 et 354. 



Cancer Gammarus yalba, Montagu, Linn. Trans., xi. 

 (1815), p. 4, t. 2, f. 2. 



Talitrus cyanea, Sabine, Suppl. to Parry's First 

 Voy. (1824), p. 238, pi. 1, fig. 12-18. 



Hiella Orbignii, Straus, Mem. du Museum (1829), 

 xviii., pi. 4. 



Hyperia Latreillii, Milne Edwards, Ann. des Sc. 

 Nat, xx. (1830), p. 388, pi. 11, fig. 1-7. 



Hyperia galba, White, Hist. Brit. Crust. (1850), 

 p. 206. 



Hyperia cyanea, Milne Edwards, Ann. des Sc. Nat, 

 xx. (1830), p. 387. 



Metcecus cyanea, Milne Edwards, Hist, des Crust, 

 p. 78. 



Lestrigonus exulans, Kroyer, Gronl. Aniph, p. 68, 

 fig. 18. ' 



Lestrigonus Boeckii, Boeck, Bern. &c. i Naturf. 

 Fordh. (1860), p. 636. 



Lestrigonus Kinahani, Spence Bate and Westwood, 

 Brit. Sessile-eyed Crust, p. 8. 



Hyperia exulans, Goes, Crust. Amph. Spetsb. (1865), 



p. 18. 



Hyperia medusarum, Spence Bate, Cat. Crust. 



Amph. Brit. Mus, p. 295, pi. xlix, fig. 1. 



