Land, Fresh-Water, and Maririe Crudacea. 135 



16. Idothea emarginata (Fabricius). 



1794. Cjnnothoit cmaniincda, Fabr., Eiiiomon. 8yst., vol. ii. ]). 508. 



Hahitat—A\)QY\d.dy Bay, 1888. Station L, 23rd May 1891 . 

 Occasionally obtained with /. haltica amongst Laminaria at 

 various places within the estuary. 



17. Idothea linearis (Liune). 



1767. Oniscus linearis, Linn., Syst. Nat., vol. ii. p. 1060. 

 1868. Idotca linearis, Bate ;>nd Westw., op. cit., vol. ii. p. 38S. 



Habitat. — Occasionally at Newhaven (Henderson). Off 

 Grail, 1888. Station X. (west of Queensferry), 31st August 

 1894, and 26th April 1901. Station IV., 22nd April 1901. 

 Several of the specimens are adorned with longitudinal light 

 and dark lines (cf. form /. sexlineata, Kroyer). 



Family Arcturid^.i 

 Genus (12) Astacilla, Cordiner, 1795. 



18. Astacilla longicornis (Sowerby). 



1806. Oniscus longicornis, Sow., British Miscellany, Taf. 19^ 

 1841. Leachia gracilis, Goodsir, Edin. New Phil. Jour., vol. xxxi. 



p. 310, pi. vi. lig. 4 ( c? ). 

 186S. Arcturus longicornis, Bate and Westw., Brit. Sessile eyed 

 Crust., vol. ii. p. 365. 

 Hahitat.—Yut\i of Forth (Ooodsir). Otf Dysart, T. W. 

 Simmons (cf. Bate and Westwood, op. cit., vol. ii. p. 369). 

 Moderately frequent in the estuary, and generally distributed. 

 G. O. Sars considers the A. gracilis of Goodsir to be the male 

 of A. longicornis. 



19. Astacilla intermedia (Goodsir). 



1841. Leachia intermedia, Goodsir, op. cit., p. 309, pi. vi. fig. 1. 

 1868. Arcturus intermedius, Bate and Westw.,' Brit. Sessile-eyed 

 Crust., p 371. 



Hahitcd. — Taken off Anstruther (Goodsir). This is the 



^ Ka Astacilla, Cordiner, was instituted in 179.'-, and Arcturus, Latralle, 

 in 1804, the family name should perhaps be Astacillid.e, from the older 

 genus, 



- James Sowerby, ''British Miscellany; or, Coloured Figures of Xew, Rare, 

 or Little-Known Animal Subjects, many not before ascertained to be Natives 

 of the British Isles." London, 1806, 8vo. 



