l9i4- ColCtAN. — Opisl hob ranch f^auna of Co. Dublin. 
and 2 olT Skcrric^s, July, 1912, one in 12 I., llic oilier in 
r6 f. : N.(\ One specimen in from 9-12 f., 3 miles off Bal- 
briggan, 1907 : Farran, '09. 
The largest of my Dublin specimens was 31 mm. in 
length and all agreed well with Hancock's figure in the 
Monograph. The body was pellucid allowing the valvular 
action of the heart to be seen both from the foot and tlie 
back. The slender hepatic branchings, too, were visible 
through the body, and were seen to start from in front of 
the rhinophorcs. Numerous bright orange copcpods similar 
in form to those inhabiting the branchial plumes of many 
Dorids were found clinging to the papillae. These were 
probably Lichomolgus doridicola. 
A. hyalina (Aid. and Hanc). 
I'iare. Thiiee specimens were dredged in 10 f. off Bullock 
in September, 1906 : Colgan, '07A. 
Proctonotus mucroniferus (Aid. and Hanc). 
Rare. A single perfect specimen and another much 
injured obtained by dredging in shallow water at Malaliide 
in September, 1843, adhering to the common sponge Hali- 
chondria panicea : Aid. and Hanc, '44, and Monograph. 
Two specimens, |j| inch (21 mm.) under a stone at 
Malahide : H addon, '86. A single specimen 9 mm. in length 
and paler in colour than that figured in the Monograph 
occurred to me in a dredging made in 12 f. off Dalkey Island 
in August, 1913 : N.C. 
This appears to be one of the rarest Nudibranchs of the 
British Isles. So far as I can ascertain, within the 70 years 
which have elapsed since it was first discovered at Malahide 
only soven individuals have been placed on record for the 
Britannic marine area, and six of these are for Irish stations. 
The Britannic distribution as at present known is the follow- 
ing : Dublin, two stations, Malahide and Dalkey ; Galway, 
Ballinakill Harbour ; Lamlash Bay, Arran, in the Clyde 
area. In captivity the Dalkey specimen was observed to 
assume the pecuhar attitude noticed by Mr. Farran at 
