281 



REPOKT on the TUNICATA of the L. M. B. C. 



DISTRICT. 



By W. a. Herdman, D.Sc, F.L.S., 



PR0FES30K OF NATURAI. HI8T0BT IN UNIVBRSITY COLLEOE, LIVERPOOL. 



The great majority of the Tunicata discussed in this Report 

 were obtained ofif the South end of the Isle of Man during 

 August, 1885. A few species were obtained at Penmaen- 

 mawr, and during the cruise of the " Hyaena," and three 

 species were found at Hilbre Island. Very few Tunicata 

 have been previously recorded in this district. Byerley, in 

 his Fauna, mentions two species of Ascidia as having 

 been found at Hilbre Island ; and Forbes, in the Malacologia 

 Monensisy records five species of Simple Ascidians from 

 the shores of the Isle of Man. In the British Mollusca 

 four species of Compound Ascidians, from the same locality, 

 are added to the list. Thus, the previous records in all 

 amount to eleven species. 



The present Report deals with forty-seven species, of 

 which at least two are new to science, while seven have not 

 been previously recorded from British seas. Nineteen of the 

 species are Simple Ascidians, twenty-seven are Compound, 

 and the remaining species is the pelagic Oikopleura flabellum. 

 I am convinced that, long as this list is, it is still far from 

 complete. The rich Tunicate Fauna of the Manx seas 

 requires a good deal of further investigation before it can be 

 said to be thoroughly known. 



LARVACEA. 



Family. — AppENDicuLARiiDiE. 

 Oikopleura flabellum, J. Miiller. 



Appendicularia jlagellum, Huxley, Phil. Trans.. lH51, part ii, 

 p. 696. 



