iSo The Irish Maturalist, August -^^cptember, 
arose far back on the tooth plate so as to give the appear- 
ance of a hinder projection. The channclhng of the tooth 
plates, each of which bears a lateral depression on its face 
for the reception of answering projections on the neighbour- 
ing plate, is not well shown by Hancock. It appears clearly 
in Sars' plate of a congenercus species, Cratena olivacca, 
Tab. xvi., pi. 8, Moll. Reg. Arct. Norveg. 
Observed under a low power, the green colour of the 
papillae in this species and of similarly coloured lines on 
the body was seen to be due to the granular contents of 
the hepatic vessels. At intervals a rapid streaming of 
these green granules from the papillae into the hepatic 
ducts and vice versa could be made out with the greatest 
clearness, and on one occasion this stream of granules was 
observed to pass from one of the papillae through the body 
and out through the vent. After a time the papillae and 
the hepatic vessels of the body lost much of their green 
colour and faded to a yellowish white, while the watch 
glass in which the animals were kept became thickly strewn 
with green granules. 
Tergipes despectus (Johnston). 
Eolis despecta. 
Locally abundant, chiefly on hydroids in shallow water 
and in association with Galvina exigua. In Kingstown 
Harbour : H addon, '86. In the shallow channel between 
Shennicks Island and the mainland at Skerries this species 
occurs in abundance on Ohelia dichotoma which is found 
there thickly investing the floating tips of the common 
sea-w€ed, Chorda filum. In August, 191 1, I took 63 speci- 
mens here, in July of the following year, 176, in July, 
1913, 114, and in, July 1914, 291, as many as 220 in a 
single gathering : N .C. Largest 6 mm. long. 
The body of this nudibranch is very pellucicK In some 
individuals examined in 191 2 the granules could be seen 
streaming up and down within the papillae, and the radula 
working to and fro as the Ohelia heads were drawn in and 
devoured. The papillae in most of the specimens numbered 
only from 5 to 6, and were capable of change of form to a 
