of the Fishery Board for Scotland. 329 



ISOPODA. 



Speleromid^e. 



SpJmroma rugicauda, Leach. 



Sphcer-oma rugicauda, Leach, Edin. Erie, vol. vii. pp. 405, 408. 



Sphceroma rugicauda, Bate & Westwood, Brit. Sess.-eyed Crust., 



vol ii. p. 408 (1863). 

 Habitat. — In brackish-water rjools on the shore at Aberlady Bay, 

 Common. They appeared mostly to creep upon or through the surface 

 layer of the soft oozy mud forming the bottom of the pools ; and only 

 when the mud was stirred would they rise and swim very rapidly through 

 the water for a short distance, then drop down again and burrow among 

 the mud. When prevented from swimming, or when taken out of the 

 water, they rolled themselves into a ball. Though observed at Berwick- 

 on-Tweed by Dr Johnston, they do not appear to have been previously 

 recorded for the east of Scotland. Mr Robertson found them plentiful in 

 a weedy brackish pool with a soft muddy bottom at Hunterston, Ayr- 

 shire. 



CUMACEA. 



Only four species are added to the Forth Cumacea in this Report, 

 viz. : — 



Cumid^e. 



Cuma pulchella, G. 0. Sars, S 9 • 



Cuma pulckella, G. O. Sars, Nye Bidrag til Kundakaben ora 



Middelhavets Invert-fauna, part ii., Cumacear, p. 24, tab. vi. 



and tab. lx. (1879). 

 Habitat. — Off St Monance, and in the vicinity of Phidra; Largo Bay, 

 common. This is a small species, and easily overlooked. Dr Norman 

 says that ' a good point for distinguishing the species is the first joint of 

 1 the second foot, which is furnished with a series of backward directed 

 1 tooth-like processes/ which is well shown in tab. lx. fig. 7, of Sars' 

 Monograph referred to above. This seems to be the first time that C. 

 pulchella has been observed in Britain ; previously it has been noticed at 

 Naples by G. 0. Sars, and Bayonne by Marquis de Folin. The integu- 

 ment is ornamented with numerous microscopic circular depressions 

 arranged in irregular oblique rows ; the anterior part of the cephalon is 

 dorsally of a dusky colour, and is darkest in the vicinity of the rostrum. 



Eudorellopsis deformis (Kroyer). 



Lexicon deformis, Kroyer, Voyage en Skand., pi. vi. fig. 3. 

 Eudorella ? deformis, G. 0. Sars, Beskrivelse af de paa Fregatten 

 Josephines Exped., fundne Cumaceer, p. 50, figs. 118-121 

 (1871). 

 Habitat. — Off St Monance and Aberlady Bay, not common. Dr Norman 

 states in refereuce to this species, ' not yet recorded as British, but I have 

 * had specimens in my collection, determined, since 1866, when I found 

 ' them in a gathering from Bridlington, sent me by G. S. Brady.' It does 

 not seem to have been observed anywhere else in Britain, and thus forms 

 an interesting addition to the Forth Fauna. In 1882 G. O. Sars described 

 this under the generic name Eudorellopsis. 



Diastylus rugosa, G. O. Sars. 



Diastylus rugosa, G. O. Sars, Om den aberrante Krebsdyrgruppe 



Cumacea og dens nordiske Arter, p. 41. 

 Diastylus strigata, Norman, Ann. Nat. Hist., ser. 5, vol. iii. p. 62 



(male). 



/-, 



