A TREMATODI! LARVA FROM BUCCINUM. HLT 
Pharyngora bacillaris, which inhabits the Mackerel and a few other 
fish in the adult state, when immature is found abundantly in the tow- 
nettings both free and in Meduse, Ctenophores and Sagitta. It is the 
only common Trematode of the plankton and might easily be swallowed 
by small fish. It occurred in a few sprats, in 3 Onos mustela and in one 
Rhombus levis. 
Podocotyle atomon, another common fish Trematode, occurred in 3 
specimens of Gasterosteus spinachia, and in all cases contained ova. 
An encysted Trematode occurred in the peritoneum of 2 specimens of 
Syngnathus rostellatus. 
The Horse Mackerel, Caranaz trachurus, on one occasion contaimed 
a mature Trematode, probably Lecithaster sp. 
LITERATURE. 
1914. Doillfus, R. ‘‘Cercaria pachycerca Diesing, et les cercaires a 
queue dite en mignon.” IX Congrés Int. de Zool. Monaco. 
1908. Lebour, M.V. “ Fish Trematodes of the Northumberland Coast.”’ 
North Sea Fish. Rep. for 1907. 
1912. —. “A Revision of the Marine Cercarie.” Parasitology, No. 4. 
1914. Nicoll, W. ‘‘ The Trematode Parasites of Fishes from the English 
Channel.”? Journ. Mar. Biol. Assoc., N.S., X., No. 4. 
