126 Rev. A. M. Norman’s Notes on British Amphipoda. 
1859. Gammarus levis, Bruzelius, Skand. Amphip. Gamm. p. 60, 
pl. ii. fig. 10, ¢ 2. 
1863. Megamera longimana, Bate & Westw. Brit. Sessile-eyed Crust. 
vol. i. p. 403, 3. 
1863. Megamera othonis, iid. ibid. p. 405, 2. 
1868. Mera longimana, Norman, Last Report Dredging Shetland, 
Brit. Assoc. Rep. p. 284, 5 9. 
aiaks longimana, Boeck, De Skand. og Arkt. Amphip. p. 382, 
Cine 
The Gammarus othonis, M.-Edwards, and Gammarus lon- 
gimanus, Leach, MS., are female and male of one species, and 
the first name has precedence. 
Hab. Shetland; the Minch; Soundof Skye; Oban; Loch 
Fyne; Firth of Clyde, many places ; Northumberland and 
Durham coasts ; Guernsey ; Roundstone, Ireland (4. WZ. N.) ; 
Banff (7. Edward); North-east Scotland (Dr. Day): Mus. 
Norm. Salcombe, Devon (Stebbing) ; Liverpool Bay (G. H. 
Fowler). 
Distribution. Bohuslin (Bruzelius); Moss, Norway 
(Boeck); Western France (MM. Dolfuss, fide Chevreauz) ; 
Marseilles (AZarton) ; Heligoland (Frey and Leuckart). 
2. Mera grossimana (Montagu). 
a Coe (Gammarus) grossimanus, Montagu, Linn. Trans. vol. ix. 
. iv. fig. 5. 
1814, Mera grossimana, Leach, Edinb. Encyeclop. vol. vii. p. 403. 
1830. Gammarus Impostii, H. Milne-Edwards, Ann. des Se. Nat. 
vol. xx. p. 368. 
1862. Mera grossimana, Bate & Westw. Brit. Sessile-eyed Crust. vol. i. 
p- 350, 3g. 
1866. Mera Donato?, Heller, Beitr. Amphip. des Adriatischen Meeres, 
p- 41, pl. iii. fig. 26, 2. 
1885. Mera Donatoz, Carus, Prodr. Faunz Mediterraneex, p. 414, 2. 
1885. Mera grossimana, id. ibid. p. 414, g. 
1888. Mera grossimana, Th. Barrois, Cat. des Crust. marins rec. aux 
Acores, p. 38, pl. iii. fig. 7, 2. 
Prof. Th. Barrois has rightly pointed out that the Mera 
Donatoi, Heller, is the female of this species. The female, 
as found in our seas, exactly accords with it. That sex differs 
from the male chiefly in the form of the hand of the second 
gnathopods, which widens rather more distally and has the 
palm less irregular, being simply crenulated throughout and 
edged with small spines (as in male) ; the strong finger is 
similar to that of the male in being furnished on the upper 
margin with a row of sete, but is without cilia on the lower 
margin. 
Hab. So far as I am aware Mera grosstmana is confined 
to the southern part of our seas, Jersey, Guernsey, and Herm ; 
