30 
The Turbellaria of Plymouth Sound and the 
Neighbourhood. 
By 
F. W. Gamble, B.Sc., 
Berkeley Fellow of Owens College, Manchester. 
I propose in this paper to furnish a list of the marine Turbellaria of 
Plymouth Sound and the neighbourhood, including all species that 
have hitherto been recorded from this locality. ‘That such an 
attempt is in some respects premature I am only too well aware, 
but I have written it for the convenience of those who are working 
at, or are interested in, the fauna of Plymouth, and it may serve as 
a starting-point in our knowledge of the Turbellaria of the Sound. 
The synonymy and descriptions of the species are given by v. Graff, 
Lang, Jensen, and recently, together with figures of the new species 
and the literature, by myself.* 
During August and September of 1892 I occupied a British Asso- 
ciation table at the Laboratory, Plymouth, and commenced an inves- 
tigation into the Turbellaria of the Sound. This was practically an 
unworked field. Montagu had indeed discovered Prosthecereus 
vittatus in Kingsbridge Estuary, South Devon, in 1815: the Channel 
Islands have been partially explored with regard to the Turbellaria : 
St. Malo and St. Vaaste-la-Hogue have been still more carefully 
explored by Quatrefages, Keferstem, and Claparéde. ‘These re- 
searches, however, deal almost exclusively with the Polycladida. 
Hence it is only recently, through the investigations of Professor 
Hallez, that the Rhabdoccelida have received due attention at 
Wimereux and in the Strait of Dover. Professor Hallez’s results 
are not yet quite complete, and I much regret my inability to consult 
the original papers.t 
The general results of my observations may be here briefly sum- 
marised. As one might have expected, a number of Mediterranean 
forms were noticed (about 18 per cent.). These, together with 
certain Scandinavian and a few new species, form the additions to 
* British Marine Turbellaria, Quart. Journ. Micros. Sci., April, 1893. 
+ Revue biologique du nord de la France, Lille, 1890-2. 
