130 
REPORT on some CRUSTACEA from the CANARY 
ISLANDS, collected by Messrs. I. C. Thompson, F'.L.5., 
and W.8. McMillan, F.L.S. 
By ALFRED O. WaLKeER, F.L.S. 
[Read 14th January, 1888. ] 
I HAVE examined the above with the following results. 
The collection is very interesting, as showing how widely 
distributed certain forms are. Most of the specimens were 
preserved in Deane’s solution, but two were mounted on 
microscope slips. Of these, one was Gastrosaccus sanctus 
(Van Beneden), and the other a larval form. 
AMPHIPODA. 
Of this order there was only a single specimen, Triteta 
dolichonyx (Nebeski), of which the most characteristic 
feature is a curious excavation in the anterior margin of 
the first gnathopods. It has only recently been discovered 
in the Adriatic, and described by Nebeski, and Mr. Stebbing 
(to whom I am indebted for the name) has also still more 
recently received it from the Clyde, where it was taken by 
Mr. Robertson. 
The genus Triteta was formerly included in Atylus, 
from which it is principally distinguished by the elongated 
merus joint and very short carpus and propodos of the 
pereiopods, especially the two first. It has hitherto been 
represented in the British fauna only by Triteta (Atylus) 
gibbosus (Bate). This resembles T. dolichonyx so closely 
in every respect, except the notch in the hand of the first 
gnathopod, that one is tempted to regard the latter as a 
