214 Part [1 —EHleventh Annual Report 
also been obtained in Aberdeen Bay. One of its peculiar characteristics 
is the structure of the eyes, which consist of four pairs of small lenses 
about equidistant from each other, and arranged round the circumference 
of a nearly circular patch of pigment. In the male the second segment of 
the urosome has the dorsal part produced backward in the form of a free 
tooth-like process, that extends to nearly the end of the next segment. 
Argissa hamatipes has been recorded for Shetland (Norman) and for the 
Clyde district (Robertson). 
Genus Ampelisca, Kroyer (1842). 
Ampelisca assimilis, Boeck. (Pl. V. figs. 32-35.) 
1870. Ampelisca assimilis, Boeck, ‘Crust. Amphip. bor. et arct.,’ 
p. 142. 
1891. Ampelisca assimilis, G. O. Sars, op. cet., p. 168, pl. lviil. 
fig. 2, 
Habitat.—Vicinity of May Island. Apparently scarce. 
This, which is one of the smaller species, is distinguished by the 
anterior antenne reaching very little beyond the end of the basal joints 
of the posterior antenne ; the two last basal joints of the posterior antenne 
are of about equal length. The epimeral plates of the last segment of the 
mesosome have the postero-lateral angles broadly rounded. ‘The telson is 
rather longer than broad ; sides of the proximal half straight and parallel ; 
of the distal half slightly rounded, and converging to the blunt-pointed 
apex, and bearing a few very small marginal sete. 
Mr Robertson records this species from the Clyde. 
Ampelisca levigata, Lilljeborg. (Pl. V. figs. 36, 37.) 
1855. Ampelisca levigata, Lilljeborg, ‘Ofv. af. Kel. Vet. Akad. 
‘| Bork.,? p23. 
1862. Ampelisca Belliana, Sp. Bate, ‘Cat. Amphip. Crust. Brit. 
(Mius.,’\p. 2o,4pk xv. dfiged. 
1891. Ampelisca levgata, G. O. Sars, op. cit., p. 169, pl. lin 
fig. 1. 
Halitat.—Largo Bay and one or two other places in the Firth of Forth, 
but not common. 
In this species the anterior antennz scarcely reach to the end of the 
basal joints of the posterior antenne. ‘he penultimate basal joint of the 
posterior antennee is considerably longer than the next, and the flagellum 
is comparatively short, being less than twice the length of the peduncle. 
The posterior pair of perelopoda are robust ; the meral joint is produced 
exteriorly, and forms a lobe-like process as long as the next joint, and 
densely fringed with cilia. The postero-lateral margins of the epimeral 
plates of the last segment of the mesosome are doubly and strongly 
sinuate, the postero-lateral angles being produced into acutely slender 
teeth. Telson moderately broad, with a pointed apex. 
According to Professor G. O. Sars, this species is the Ampeliscu 
belliana of Sp. Bate, and Ampelisca levigata, Sp. Bate, is the same 
as Ampelisca tenuccornis, Lilljeborg, which was described by Lilljeborg in 
1855. 
Ampelisca spinipes, Boeck. (Pl. V. figs. 38-40.) 
1870. Ampelisca spinipes, Boeck, ‘Crust. Amphip. bor. et arct.,’ 
p. 148. 
1891. Ampelisca spinipes, G. O. Sars, op. cit., p. 173, pl. 60, 
fig. 2. 
Habitat.—Vicinity of May Island, Firth of Forth. Not common, § - 
