—_=~* 
of the Fishery Board for Scotland. 215 
The superior antenne of Ampelisca spinipes are proportionally much 
longer than in the last species, as they extend considerably beyond the 
end of the peduncle of posterior antenna. The terminal joints of the 
last pair of pereiopods are comparatively narrow. ‘The posterior margin 
ot the expanded plate of the basal joint bends obliquely upwards at a 
moderately acute angle. The postero-latcral angles of the epimeral plates 
of the last segment of the mesosome are nearly rectangular. The telson 
is comparatively narrow. Length of Forth specimens, 15 mm. 
Genus Amplhilochoides, G. O. Sars (1892). 
Amphilochoides odontonyx, Boeck. (Pl. V. figs. 41, 42.) 
1870. Amphilochoides odontonyx, Boeck, ‘Crust. Amphip. bor. et 
Bare, p. Ol. 
1892. Amphilochoides odontonyx, G. O. Sars., op. cit., p. 221, pl. 
Rexy. fig 2. 
Habitat.—Vicinity of Fidra Island, Firth of Forth. 
This, though a small species, is quite easily distinguished from Amphi- 
lochus manudens, which it resembles in size and form by the structure of 
the gnathopods. The inner edge of the dactylus of the first and second 
enathopods, but especially of the second pair, is produced near the hinge 
into a small but quite distinct blunt-pointed tooth, that interlocks into an 
opposing notch on the palm. It is further distinguished from Amphilo- 
choides pusillus, G. O. Sars, which has the claws of second pair of gnatho- 
pods similarly toothed, by the postero-lateral margins of the epimeral 
plates of the third segment of the mesosome being sinuate, and the angles 
slightly produced and tooth-like. Professor Sars does not give (/oc. cit.) 
any British locality for Amphilochoides odontonyx, but, on the authority 
of Meinert, records its occurrence in the Kattegat and Skagerak. He has 
also obtained it in a few places off the west coast of Norway. Mr David 
Robertson, of Millport, records its occurrence in the Clyde district. 
Genus Cerapus, Say (1817). 
Cerapus crassicornis (Spence, Bate). 
1855. Siphonecetes crassicornis, Sp. Bate, ‘Rep. Brit. Assoc.,’ 
p. 59. 
1857. Stphonecetes crassicornis, White, ‘Pop. Hist. Brit. Crust.,’ 
p: 197. 
This species was obtained among some material collected by a tow-net 
fixed to the head of the beam-trawl. It occupied a tube a little longer 
than itself, composed of blackish mud, held together by some kind of 
glutinous substance. It was able to move freely about with its tube, and 
to withdraw itself at pleasure. Only one specimen has been obtained. 
oe CUMACEA. 
Genus Petalomera, Stimpson (1858). 
Petalomera declivis, G. O. Sars. (PI. V. fig. 43.) 
1892. Petalomera declivis, T. and A. Scott, ‘Ann, and Mag. Nat. 
Hist.,’ ser. vi., vol. x. p. 206. 
This Cumacean was obtained in Largo Bay in 1892. It appears to be 
a rare species in the Firth of Forth. More recently (April 1893) several 
specimens were obtained in bottom material collected a few miles east of 
May Island, 
