AMPHIPODA OF THE BRITISH ISLES. 147 
NIPHARGUS SUBTERRANEUS, Leach. (Plates 16 and 17. fig. 1.) 
1814, Gammarus subterraneus, Leach, Edinburgh Encyclopeedia, vol. vii- 
p- 408. 
1841-4. Gammarus puteanus, Koch, Deutschlands Crustaceen, Myria- 
poden und Arachniden, Heft 36, Taf. xxii. 
18538. Niphargus stygius, Westwood, Proc. Linn. Soc., No. li. p. 218. 
a . Spence Bate, Ann. & Mag. N. H. ser. 2, xix: 
p. 146. 
1855. Niphargus aquilex, Schiddte, Oversigt over det Ke. Danske Vidensk.- 
Selskabs Forhandlinger, 1855, pp. 349-351; also in Nat. Hist. 
Review, i. p. 41, fig. B. 
1857. Miphargus aquilex, White, Popular History of British Crustacea, 
p. 187. 
1857. Gammarus puteanus, La Valette St. George, “De Gammaro 
puteano,” Dissertatio Inauguralis, 1857. 
1862. Miphargus stygius, Spence Bate, Cat. Amphip. Brit. Mus. p. 174, 
pl. xxxii. fig. 1. 
1863. Niphargus aquilex, Spence Bate & Westwood, Brit. Sessile-eyed 
Crust. 1. p. 315. 
1888. Miphargus aquiler, Stebbing, Report on the ‘Challenger’ Amphi- 
poda, p. 316. 
1889. Gammarus puteanus (“ & main triangulaire ”), Moniez, Rev. Biol. 
du Nord de la France, i. pp. 41-46. 
1890. Niphargus puteanus, Wrzesniowski, Zeitschrift fur wissenschaft- 
liche Zoologie, L. 4, p. 673. 
1893. Niphargus subterraneus, Della Valle, Gammarini del Golfo di 
Napoli, p. 704 (in part). 
1896. Gammarus puteanus, Hamann, Europiiische Hohlenfauna, Jena, 
p: 234 (an part). 
1899, Mphargus aquilex, Harmer, Trans. Norfolk & Norwich Naturalists’ 
Society, vol. vi. pp. 489-491. 
1900. Miphargus puteanus, Armand Viré, Faune souterraine de France, 
p. 34 &e. 
Specific diagnosis.—Body slender, first four side-plates not so 
deep as their respective segments ; postero-inferior angles of the 
first three segments of the pleon broadly rounded. 
Superior antennz half as long as the body ; flagellum of about 
20 joints, rather more than one and a half times the length of 
the peduncle; secondary appendage of two joints, shorter than 
the first two joints of the main flagellum. Inferior antenna 
with the flagellum of 7 to 9 joints. 
Maxillipedes with the lobes small, inner lobe reaching only to 
the end of the inner margin of the meros, and outer lobe reaching 
only halfway along the inner margin of the carpus. \ 
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