yard THE INVERTEBRATE FAUNA 
have often found it under stones and in 
rock pools while shore-collecting. It is 
with us nearly confined to the littoral 
and upper laminarian zones. 
Ophiocnida balla (Thompson). 
O. brachiata (Mont. 
Off Anstruther (J. G). 
In his “History of British Starfishes,” 
Forbes mentions two species of Ophiocoma, 
viz., Ophiocoma Ballii of Thompson, from 
the coast of Dublin, ard a new species, 
O. Goodsiri, from the Forth. From a 
comparison of type specimens of these, Mr 
Norman has determined that 0. Ballii and 
O. Goodsiri belong to the same species, 
and of the two specific names, that of 
Balli has the priority. 
Amphiura ball is found on the northern 
and eastern coasts, and in the Irish Seas. 
): 
Firth of Forth (Howd.). 
The Ophiocoma brachiata of Forbes. We 
have never found it in the Forth, and 
include it in our list on the authority of 
Dr Howden. 0. brachiata has elsewhere 
been recorded from the western and Irish 
coasts. 
Ophiothriz rosula (Linck). 
Leith (Hd. Mus.) ; Firth of Forth (U‘B.) ; 
Firth of Forth, 22 fathoms (1 & B.). 
The Ophiocoma rosula of Forbes. This is 
the most abundant of the Forth species of 
Ophiuride, occurring in great numbers on 
the oyster and shell banks, and extending 
into deep water. The pigmentation of 
different individuals is very varied, but it 
is always easily recognised by the generic 
character of the two large triangular plates 
on the dorsal surface opposite the origin 
of each ray. 
