142 Proceedings of the Royal Physical Society. 



Family Cryptoniscid^. 

 Genus (31) Cryptothir, Dana, 1852. 

 42. Cryptothir balani, Spence Bate. 



I860. Liriope balani, Bate, Brit. Assoc. Rept. (1860), p. 225. 

 1869. Cryptothiria balani, Rate and Westw., Brit. Sessile-eyed 

 Crust., vol. ii. p. 267. 



Habitat. — Firth of Forth, parasitic on Balanus balanoides 

 (inside the shell). This is one of the interesting additions 

 to the fauna of the Firth of Forth by H. D. S. Goodsir. 

 I obtained a single specimen of this curious parasite at East 

 Tarbert, Loch Fyne, on the same kind of barnacle. 



Suborder Amphipoda. 



The classification (and arrangement) generally followed is 

 that of G. 0. Sars' Crustacea of Norway, vol. i. (Amphipoda), 

 1890-95. See also papers on "British Amphipoda," by Kev. 

 A. M. Norman, in Ann. and Mag. Nat. Hist, for January, 

 February, April, and July 1900. 



Hyperiidea. 



Family HyperiidjE. 



Genus (1) Hyperia, Latreille, 1825. 



1. Hyperia galba (Montagu). 



1815. Cancer gammarus galba, Mont., Trans. Linn. Soe., vol. xi. 

 p. 4, pi. ii. fig. 2. 



Habitat. — Frequent and generally distributed ; often found 

 associated with Aurelia cyanea and other large Medusae. 



Genus (2) Hyperoche, Bovalius, 1887. 



2. Hyperoche tauriformis (Bate and Westwood). 



1868. Hyperia tauriformis, Bate and Westw., Brit. Sessile-eyed 



Crustacea, vol. ii. p. 519. 

 1890. Hyperoche Kroyeri, G. O. Sars, Crustacea of Norway, vol. i. 



p. 9, pi. iv. 



Habitat. — Generally, though sparingly, distributed through- 

 out the estuary. 



