CAMPECOPEA CRANCHII. 437 
plates of equal size and structure, which is the ordinary 
type of these organs. The legs are terminated by two 
strong hooks. The tail has the last joint entire and 
convex, without any appearance of carina. 
Taken at Falmouth by My. Cranch. We have found 
this species mingled plentifully with the preceding, and 
believe it will ultimately prove to be only the female 
form of C. hirsuta. 

We take this opportunity, at the close of the de- 
scriptions of the water-breathing Isopoda, to refer to 
Professor Schiodte’s recent elaborate memoir on the 
structure of the mouth of these animals, with especial 
reference to the parasitic suctorial species composing the 
family Cymothoide (of which we possess no British repre- 
sentative), published in the ‘‘ Naturh. Tidsskrift,” ser. ii1., 
vol. iv., and of which a careful translation has just been 
published in the “Annals of Natural History ” for 
January, 1868. 
