270 ME. a. M. THOMSON ON THE OCCTJREENCE OF 



The legs of the second pair are about two thirds as long as those 

 preceding them, and are somewhat similarly formed ; but the 

 setae on the inner margin of the basos are all beautifully plumose. 

 The exopodite is also relatively much longer, its setse reaching to 

 the extremity of the carpal joint. The legs of the third pair are 

 shorter but relatively stouter than the second pair, but, as usual, 

 have no exopodite. While the ischium is very short, the carpos is 

 about as long as the basos. The last two joints are very short, 

 and are nearly hidden by the long setse at the end of the carpos. 

 The legs of the fourth pair (fig. 9) have their joints diminishing 

 in length towards the extremity ; all the joints carry numerous 

 setse, those on the basos being finely plumose. 



The conical telson (fig. 11) is about as long as the last joint of 

 the hind body, and bears spines on both sides on its distal half, 

 the two terminal spines being hardly longer than those at the 

 sides. The scape of the uropoda and its inner branches are uni- 

 formly spinous on their inner margins ; the outer branch on its 

 outer margin. Each terminates in a rather long spine. 



Habitat. Bay of Islands ; one mature female and three small 

 immature females (two of them very minute) were taken by the 

 dredge in 8 fathoms. 



EXPLANATION OF THE PLATES. 



Plate XVL 



Cyclaspis levis. 



Fig. 1. Male, lateral view. 



2. The same, dorsal view. 



3. Portion of integument (highly magnified). 



4. Portionofanten^ary segment of female : a^, antennule ; «-, riidimentary 



ante^hte. 

 .5. Antenna of male. 

 6. Mandible : a}, right side ; (i^, left side. 



Plate XVIL 



Cyclaspis levis. 



Fig. 7. Maxilla, first pair. X 125. 



8, Maxilla, second pair. Xl25. 



9 1 

 ■ [ Maxillipeds. xl25. 



