CRUSTACEA OP FRlIifZ-JOSEF LAND. ' 99 



claws are feeble (PI. 5. fig. 14). The first pair of swimming-feet 

 resemble those of Delavalia palustris, but both branches are more 

 elongate and the lengths of the joints are proportionally slightly- 

 different ; they differ also in their armature, as shown by the 

 figure (fig. 9, PI. 6). The other swimming-feet are also moderately 

 elongate and slender; the joints of the inner branches, as shown by 

 the figure of the fourth pair (fig. 10, PL 6), have their inner distal 

 angles more or less produced downwards into spine-like processes 

 as in Delavalia rohusta, Brady & Eobertson. The fifth pair also 

 somewhat resemble those of that species, but the secondary 

 joint is proportionally broader and of a somewhat diff'erentforin ; 

 and there is a peculiarity in the hiuge arrangement of the joint 

 by which it can be extended at nearly right angles to the body 

 (fig. 11, PL 6). The caudal furca are about as long as the com- 

 bined lengths of the last two abdominal segments. 



Sah. Cape Gertrude (Cape Plora), Northbrook Island ; rather 

 rare. 



Memarhs. This species partakes of the characters of Delavalia, 

 jjalustris on the one hand and of Delavalia robusta on the other ; 

 but it differs from the first by the form of the fifth pair of 

 thoracic feet and from the second in the structure of the first 

 pair. A difference may also be observed in the proportional 

 lengths of the joints of the antennules, as well as in the more 

 robust form of the posterior foot-jaws. 



G-enus Maeaenobtotus, MrazeJc, 1893. 



Maeaenobiotus Yejdovskti, Mrazeh. (PL 6. figs. 12-17.) 

 1893. Maraenohiotus Vejdovskyi, Mrazek (54), p. 103, pi. 4. %s. 17-32, 

 pi. 5. figs. 33-37. 



This is a freshwater species ; it was first discovered by Mrazek 

 in Bohemia, and it has also occurred in one or two places in 

 Scotland. It is a slender Copepod, and in this respect resembles 

 certain species of Moraria — a genus with which it is closely 

 related. One of the principal characters that distinguishes 

 Maraenohiotus from Moraria is the very rudimentary form of the 

 mandible-palp (fig. 14) ; whereas in Moraria the mandible-palp, 

 though small, is normal in structure. The Franz-Josef Land 

 specimens resemble those found in Scotland in almost every 

 detail of structure : the chief difference observed is in the form 

 of the secondary joints of the fifth thoracic feet ; in the Franz- 



