No. VII. CRUSTACEA. 253 



from water drawn, in mid-winter, from under the ice-floes 

 at the winter quarters of the ' Alert,' lat. 82° 27'. There are 

 three species, unfortunately two of them represented only by 

 a single specimen, which being mounted prevents the possi- 

 bility of full examination ; the first of these is a form closely 

 resembling apparently our Idya furcata (Baird), but differs 

 manifestly in the form of the last legs, which are ovate 

 instead of produced and linear, as in the just-mentioned 

 species ; this new form may be named Idya palceocrystica. 



The next species is remarkable on account of the nume- 

 rous long setae of the anterior antennae, which are not longer 

 than the cephalo-thorax, and also the very long setae of the 

 swimming feet; it is possibly a Dias, and may be called 

 Dias (?) Mossi. 



The last I doubtfully refer to the genus Pseudocalanus 

 of Boeck, and it may be named P. Feildeni. 



NOTES ON THE OSTRACODA. 

 By George Stewardson Brady, M.D., F.L.S. 



1 . Mud from ravine, Repulse Bay, Hall's Land ; 1 50 feet 

 elevation, lat. 82° 10' N. 



Cytheropteron montrosiense, Brady, Crosskey and 

 Robertson. 



2. Mud from Fiord Valley, lat. 82° 8' N. ; 200 feet eleva- 

 tion, from valves of shells. 



Gypris curvata^ nov. sp. 



3. Mud-beds, Cave Ravine ; 100 feet elevation. Lat. 82° 

 32' N. 



