EXPLANATION OF PLATE XXI. 



Lychas albimanus , n. sp. 



Fig. I. — Arm and hand from above. 

 J, 2. — Vesicle and aculeus from side. 



Palamnaeus tristis, n. sp. 



Fig. 3. — Arm and hand from above. 

 j^ 4. — Hand and fingers from below. 



