374 DISCOVERY REPORTS 



Third calyptopis. Eleven specimens examined (Fig. 240, b). Length range 2-4-2-9 mm.; average 

 length 2*7 mm. 



The carapace is unchanged except for the appearance of the rudiments of the dorsal crest. The 

 inferior margin is smooth. 



The compound eyes are globular and pigmented. 



The basal segment of the first antennal peduncle bears a strong toothed spine on its outer, distal 

 margin. This reaches to about the middle of the last peduncular segment. 



0-25mm 



Fig. 24. Nematoscelis megalops. a, third calyptopis, lateral view ; b, telson and uropods. 



The second antennae and thoracic appendages have not changed. 



There are now six abdominal segments and a telson. The abdomen bears no appendages. 



The lateral uropods of the telson are now developed and spinose. The outer ramus of the uropod 

 is somewhat longer than the inner and its outer margin is produced as a small, strong tooth. The 

 remaining armature of the telson is unchanged. 



A dorsal view of this stage can be seen in Frost (1935), and is, therefore, not figured here. She does 

 not, however, indicate the small, smooth projection on the posterior margin of the carapace. This can 

 be seen even in lateral view. 



