320 
HISTORY OR BRITISH CRUSTACEA. 
and third thoracic plate-like appendages, marked in the 
centre with black patches. A variety (P. Boscii) appa- 
rently of this has the body of a pale colour. 
Hab. Torcross, Devon, on the Mustelus vulgaris and 
Galeus . Mr. Cocks, of Falmouth, took the species from a 
specimen of the Carcharias glaucus , captured a few miles 
from Falmouth harbour in 1849. 
Fam. CECROPIDJE , Baird. 
Head as in Pandaridce . There is a single plate-like ap- 
pendage on the dorsal surface of the thorax. The oviferous 
tubes are concealed under a shield-shaped plate, and twisted 
in many convolutions. 
The naturalist, Dr. Baird tells us, who went out in the 
expedition under the command of the “unfortunate La 
Peyrouse,” found a poor diseased sunfish, on the coast to the 
north-east of Nootka Sound, infested by different species of 
parasites (the one on the gills was a Cecrops ); and it is on a 
species of sunfish ( Orthagoriscus mola), occasionally caught 
on our coasts, that the British Cecrops has been always 
found. 
