of the Fishery Board for Scotland. 
329 
ISOPODA. 
SPMROMID^E. 
Sphceroma mgicauda, Leach. 
Spheeroma rugicauda, Leach, Edin. Enc, vol. vii. pp. 405, 408. 
Spkceroma rugicauda, Bate & Westwood, Brit. Sess.-eyed Crust., 
vol ii. p. 408 (1863). 
Habitat. — In brackish-water pools 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 Hnnterston, Ayr- 
shire. 
CUMACEA. 
Only four species are added to the Forth Cumacea in this Report, 
viz. : — 
CUMID.E. 
Cuma pulchella, G. 0. Sars, <$ $ . 
Cuma pulchella, G. 0. Sars, Nye Bidrag til Kundakaben om 
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 
' the second foot, which is furnished with a series of backward directed 
' 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. O. Sars, and Bayonne by Marquis de Eolin. 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). 
Leucon deformis, Kroyer, Voyage en Skand., pi. vi. fig. 3. 
Eudorella ? defownis, 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 reference to this species, 1 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 f 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). 
