227 ON SOME NEW AND RARE COPEPODA FROM THE CLYDE 
having found it not unfrequent in some dredged material 
from Ayr Bay.  Delavalia emula has both branches of the 
first pair of swimming feet three-jointed, the second and 
third joints of the inner branches being subequal and 
together rather longer than the first joint; and, though in 
this respect the species does not agree with the generic 
definition, it is nevertheless a typical De/avalza, and there- 
fore we prefer to leave it in the genus to which it was first 
assigned. | 
(?) DELAVALIA, Sf. 
This is another interesting aberrant species of De/avalza, 
also from the Clyde, but we have not yet had time to 
prepare a description of it. It is apparently a typical 
Delavalia, except that, like Delavalia emula, the inner 
branches of the first pair of swimming feet are three- 
jointed ; it differs, however, from that species in having thie 
first joint of the inner branches long and slender, nearly 
equal to the entire length of the outer branches, while the 
second and third joints, though distinct, are very short. In 
this respect it resembles some of the species of Dactylopus. 
DELAVALIA (?) ROBUSTA, brady. 
A Delavalia, which appears to be identical with VD. 
robusta, except in the form of the principal terminal seta of 
the inner branches of the first pair of swimming feet, was - 
comparatively frequent in one or two of the Clyde dredg- 
ings recently collected, and especially in a dredging from 
Kilbrennan Sound. In these Clyde specimens the principal 
terminal seta of each of the inner branches of the first feet 
is stout at the base, but is otherwise long and _ slender, 
and is, so far as we have observed, invariably curved forward 
in a falcate manner: the concave margin of the seta is also 
furnished with a dense fringe of delicate cilia. The form of 
this seta appears to be the only point of difference betweerg, 
the Clyde specimens and Delavalia robusta as described and 
figured by Dr. Brady. Delavalia robusta has not previously 
been recorded for Scotland, Dr. Brady’s specimens having 
been obtained off the coasts of Durham and Yorkshire. 
