593.5 951 
EY 
A Carcinological Campaign 
URING the last few months there has been remarkable activity 
in discussing and describing new and peculiar forms of the 
smaller crustacea. 
At Liverpool last autumn Mr A. O. Walker (15) announced his 
new Cumacean genus Zeuconopsis, in which the male has on the 
second joint of the third foot a pair of curved blade-like processes, 
the feature unique, the function not yet explained. 
In the Transactions of the Royal Irish Academy, Mr W. T. 
Calman (3) has enriched the caridea or true shrimps with a new 
family, Bresiliidae, established for a specimen taken at a depth 
of 750 fathoms off the south-west coast of Ireland. In the 
Transactions of the Royal Society of Edinburgh, Mr Calman (2) 
has re-described and re-figured the Anaspides Tasmaniae of G. M. 
Thomson, with a view of discussing the systematic position of this 
extremely interesting crustacean. It is found in Tasmania in pools 
at an elevation of 4000 feet. It is in structure at present quite 
unique. This combination of uncommon form with uncommon 
habitat led its learned discoverer to say that “ owing to long isola- 
tion it has undergone very profound modification.” But it may 
equally well be supposed that its isolation has enabled it to retain 
characters which in other crustaceans have been profoundly modified. 
Reasons are given by Mr Thomson for the opinion that the ancestral 
forms of Anaspides found their way from the sea into the streams 
and lakes of Tasmania as far back as Mesozoic times. Its thoracic 
limbs being divided into walking and swimming branches, it has 
reasonably been grouped with the Schizopoda or “cleft-foot” 
shrimps, and in some respects it seems to come nearest the 
Euphausid family, so distinguished for luminous organs. To such 
organs I fancied that the minute group of ‘ocelli’ on the back of 
the head, which Mr Calman has pointed out, might perhaps belong, 
but the guess has found no favour, although visual ocelli can 
scarcely be needed to supplement the stalked eyes. In the seg- 
ments of the trunk the animal is rather like an amphipod, which it 
also resembles in having simple branchial vesicles. But these are 
in pairs. Mr Calman speaks of this latter circumstance as without 
parallel in adult malacostraca, overlooking, it would seem, the 
