Rev. A. M. Norman’s Notes on British Amphipoda. 129 
1853. Gammarus punctimanus, A. Costa, Ricerche sui Crost. Amfip. 
del Regno di Napoli, p. 222, pl. iii. fig. 6, ¢. 
1853. Gammarus obtusunguis, id. ibid. p. 219, pl. iii. fig. 8, d junior. 
1853. Amphithoé semicarinata, id. ibid. p. 210, pl. iii. fig. 8, 2. 
1857. Gammarella orchestiformis, Bate, Ann. & Mag. Nat. Hist. ser. 2, 
vol. xix. p. 148, ¢. 
1862. Gammarella brevicaudata, Bate, Cat. Amphip. Crust. Brit. Mus. 
p- 180, pl. xxxii. fig. 8, ¢; Bate & Westw. Brit. Sessile-eyed Crust. 
vol. i. p. 380, 3. 
1862. Gammarella Normant, iid. ibid. vol. i. p. 333, 9. 
1874. Gammarella brevicaudata, Stebbing, Ann. & Mag. Nat. Hist. 
ser. 4, vol. xiv. p. 13, pl. ii. fig. 3a-g, 5 2. 
1886. Gammarella longicornis, Keehler, Faun, litt, des Hes Anglo- 
Normandes, p. 60, ¢& 2 
1888. Gammarella brevicaudata, Th. Barrois, Cat. des Crust. marins aux 
Acores, p. 47, pl. iv. figs. 5-12, d 9. 
Hab. Jersey ; Falmouth (A. M,N.) ; Torquay (Stebbing) : 
Mus. Norm. Salcombe Harbour, Devon (Stebbing); off 
Hunterston, Firth of Clyde (D. Robertson). 
Distribution. Adriatic (Heller); Azores; Northern and 
Western France (Th. Barrois); St. Lunaire and Arcachon, 
M. Dolfuss ( Chevreaux). 
In young males the hand of the second gnathopod differs 
markedly from that of the adult, especially in the finger, 
which is not more than half the length of the hand. 
This is a southern form, not as yet recorded from any 
station north of the Firth of Clyde. 
Genus VII. Cuerrocratus, Norman, 1865. 
(Nat. Hist. Trans. Northumberland and Durham, vol. i. (1865) p. 12.) 
1. Chetrocratus assimilis (Lilljeborg). 
(Pl Xie 13,and Plex) fig.) 
1851. Gammarus assimilis, Lilljeborg, Ofv. af Kongl. Vet.-Akad, Forh. 
1851, p. 23. 
1853. Gammarus assimilis, id. ibid. 1858, p. 445. 
1859. Gammarus assimilis, Bruzelius, Skand. Amphip. Gamm. p. 58. 
1862. Gammarus assimilis, Bate, Cat. Amphip. Crust. Brit. Mus. p. 214. 
1865. Chetrocratus mantis, Norman, Nat. Hist. Trans. Northumb. and 
Durham, vol. i. p. 13, pl. vii. figs. 14, 15, g. 
1868. Cheirocratus mantis, Bate & Westw. Brit. Sessile-eyed Crust. 
vol, i. p. 513, 3g. 
1870. Chetrocratus ussimilis, A. Boeck, Crust. Amphip. bor. et arct. 
. 134. 
1876. Cheirocratus assimilis, A, Boeck, De Skand. og Arkt. Amphip. 
p. 398, pl. xiv. fig. 3. 
The telson (Pl. X. fig. 13) has the central portion of the 
extremity of each half concave, while the corners are pro- 
Ann. & Mag. N. Hist. Ser. 6. Vol. iv. 9 
