490 WALTER E. COLLINGE. 



Fig. 93. — Lateral view of the mesosomatic segments sliowing the 

 peculiar pleural plates. 



Fig. 94. — x 50. Dorsal view of the left uropod. 



Fig. 95. — X 50. Ventral view of the left uropod. 



Fig. 96. — x 15. Dorsal view of the telson and last metasomatic 

 segment. 



The author desires to thank the Carnegie Trust for the 

 Universities of Scotland for a grant to defray artists' charges. 



