240 
SECOND REPORT upon the TUNICATA of the 
EME BeC, DS IRC 
By W. A. Herpman, D.Sc., F.L.S., F.B.S.E., 
PROFESSOR OF NATURAL HISTORY IN UNIVERSITY COLLEGE, LIVERPOOL. 
With Plate XIII. 
[Read 10th May, 1889. ] 
In the previous report* I recorded forty-seven species, 
seven of which were new to British seas and two new to 
science; and this long list appears to have nearly exhausted 
the Tunicate fauna of the district, since, although a large 
number of specimens have been collected during the last 
three years, I am only able now to add four species to the 
record. Of these, however, two are of great interest :— 
the one is a Molgula new to science, obtained during the 
‘““Weathercock”’ expedition of 1886; while the second, 
Molgula citrina, is a species which was described in 1848 
by Alder and Hancock, and has not since been heard of. 
T have found it on the shore at Puffin Island, and at two 
or three other localities. 
The successive cruises of the ‘‘Hyzena” in Liverpool 
Bay have yielded a good deal of the material from which 
the following notes were drawn up, and the shores of 
Puffin Island have proved to be very rich in Compound 
Ascidians, upon some of which I have commenced inyes- 
tigations which will form the subject matter of a future 
report. 
The following twenty species of Ascidians have been 
* See ‘‘Fauna of Liverpool Bay,” vol. i1., 1886, p. 281; and also ‘‘ Notes on 
Variation in the Tunicata,” tom. cit., p. 354. 

