t9i4. CoLGAy.— Op is//; odr(r?H/i Fauna of Co. Dublin. 
Doubts have more than once been expressed as to the 
distinctness of this species from G. tricolor. In spite of 
many points of agreement with that species, it certainly 
differ? from it in general aspect and colour as well as in 
habitat. The present species appears to be almost exclu- 
sively littoral, while G. tricolor, which is larger and more 
chims}' in its proportions, appears to be confined to fairly 
deep water. The most obvious distinction is in colour, 
the violet tints which are almost invariably present in 
G. tricolor being absent from all of the numerous specimens 
of G. Farrani taken at Shennicks Island. To these colour 
distinctions, which in themselves are insufficient as specific 
characters, may be added certain anatomical distinctions 
of perhaps greater value. An examination of the radulae 
and jaws of 12 specimens of G. Farrani and 10 specimens 
of G. tricolor showed that the teeth in the lirst species ranged 
from 35 to 54 in number with an average of 42, in the second 
species from 60 to 80 with an average of 68. A large speci- 
men of G. Farrani had 40 teeth in the radula. while a much 
smaller specimen of G. tricolor had 60. These differences 
would appear, then, to be constant and not due to different 
stages of development in two colour varieties of one and the 
same species. In the form of the mandible edges, too, (the 
Kaurand of Bergh) a further distinction was noticed. The 
armature of the edge in G. Farrani was more distinctly 
dentate than in tricolor in which the edge was broken by 
a series of prominent tubercles rather than the row of deep- 
cut, fiat-topped teeth which appeared in G. Farrani, and 
are well figured by Bergh (Bcitr. zur Kennin. dcr .Eolid., v., 
1878, Taf., xiii). On the whole, then, G. Farrani seems 
to be entitled to specific rank. 
G. picta (Aid. and Hanc). 
Eolis picta. 
A})parently rare. A single specimen taker, at ]\lalahide 
(Mr. Alder and Dr. Farran) Thompson, '44. One specimen 
dredged in 12 f. off Church Island, Skerries, July, 1908 : 
Colgan, '09. Taken in 8 hauls off Skerries and Dalke\', 
191 2-14, in from 8 to 14 f., a total of 19 specin:M3ns tlu 
largest 7 mm. long : y.C. 
