19M. COT.OAN. — Opisthobranch Fauna of Co. Dublin. 201 
found from 13 to 15 rows in the radula of the variety with 
from 5 to 7 laterals, while Bergh in 4 specimens of the 
type found from 16 to 18 rows with a uniform 8 laterals 
in all 4. 
Acanthodoris pilosa (Miiller). 
Doris pilosa. 
Rather common between tide-marks, usually on Fiicus 
serratus ; frequent in dredgings. " The first Irish specimen 
of this Doris that I have seen was found in Dublin Bay 
by G. J. Allman, Esq." Thompson '40A. Very common 
round Salt Hill : Haddon '86. Frequent at low water, 
Skerries, Portrane, Malahide, and Sandycove, 1908-13, a 
total of 103 specimens taken, as many as 38 in a single 
gathering ; dredged six times off Skerries, 1911-13, in from 
2 to 15 f., a total of 20 specimens ; one specimen dredged 
in 10 f. off Bullock, 1911 : N .(\ Largest 41 mm. long. 
This species varies greatly in colour on the Dublin Coast 
as elsewhere. Several shades of brown are common and 
often assimilate closely with the Fucus on which the animal 
was found spawning freely in July, but shades passing 
from mouse-colour to light lavender and cream white are 
frequent. All of the deeper water individuals dredged 
off Bullock and Skerries in 10 f., 13 f., and 16 f. were pure 
cream colour with yellow rhinophores. On dissection of 
12 Dublin specimens, ranging from 9 m.m. to 25 m.m. in 
length (in spirit), the number of rows in the radula was 
found to vary from 24 to 30 ; the lateral plates were 3 or 
4 in number in each half row of the smaller specimens, 
and 5 in the largest. Bergh, in Alaskan specimens, found 
from 3 to 6, and Meyer and Mobius, in Kieler Bucht speci- 
mens, from 5 to 7 laterals in each half-row. 
Adalaria proxima (Aid. & Hanc.) 
Doris proxima. 
Two specimens each 11 mm. in length were dredged in 
Malahide River on the loth December, 1912, by Professor 
Bayley Butler, This is the first Irish record for the species 
