Land, Fi^esh- Water, and Marine Crustacea. 163 



92. Gammarits Dtcebeni, Lilljeborg. 



1851. Gammarus Dueheni, Lillj., Ofvers af K. Sveuska Vet. -Acad. 

 Forhandl., p. 22. 



Rahitat. — Taken in the brackish water lagoon at the mouth 

 of the Cocklemill Burn, near Largo, 1896 ; also in brackish 

 water pools on May Island, 13th June 1893. 



93. Gammarus locusta (Linne). 



1767. Cancer locusta, Linn., Syst. Nat., ed. xii. , vol. ii. p. 1055. 

 1868. Gammarus locusta, Bate and Westw., Brit. Sessile-eyed Ciust., 

 vol. i. p. 378. 



Habitat. — Common, especially in the littoral zone. 



94. Gammarus pulex (De Geer). 



1752. Squilla ponce, De Geer, Mem. pour Servir a I'Hist. des 



Insects, vol. vii. p. 525, pi. 33. 

 1777. Astacus pulex, Pennant, British Zoology, vol. iv. p. 17. 



Habitat. — Common in shallow fresh-water lakes, slow 

 streams, ditches, etc., throughout the district. 



Genus {^^) Melita, Leach. 



1 95. Melita. obtusata (Montagu). 



1804. Cancer gammarus oUusatus, Mont., Trans. Linn, Soc, vol. ix. 



p. 5, pi. ii. fig. 7. 

 1863. Melita obtusata, Bate and Westw., vol. i. p. 407. 



Habitat. — Moderately frequent throughout the estuary. 

 96. Melita dentata (Kroyer). 



1842. Gammarus dentatus, Kroyer, Naturh. Tidsskr. 1 R., vol. iv. 



p. 159. 

 1862. Mega.mcera dentata. Bate, Catal. Amphip. Brit. Mus., p. 225, 



pi. xxxix. fig. 4. 



Habitat. — Taken in moderately deep water (28 fathoms) 

 at the mouth of the estuary in January 1890 ; rare. Only 

 two specimens, one partly dissected, are in my collection. 



^ Two specimens of Melita gladiosa, Bate, were in 1888 recorded by me 

 from Largo Bay (cf. Sixth F. B. RepL, part iii. p. 247), but they were 

 probably merely well-developed males of M. obtusata. 



