384 



Dr. C. Cliiltoii on the 



large, strongly curved, its ianer margin bearing a prominent 

 convex process near the base, fitting into the depression in 

 the palm. Persopod 1 slightly longer tlian the second, 

 which has the finger indented. Peraeopods 3 and 4 with 

 basal joint oval, larger and slightly narrower in the fourth 



Fi?. 10. 



Fi-. 12. 



Fig, 11. 



Fi<:. 13. 



Fi^. 14. 



Fig. 10. — Orchestia tucurauna, inferior portion of tliird pleon-segment. 

 Fig. 11. — Orchestia tucurauna, first uropod. 

 Fig, 12. — Orchestia tucurauna, second uropod. 

 Fig. 13. — Orchestia tucurauna, third uropod. 

 Fig. 14. — Orchestia tucuraima, telson. 



than in the third ; basal joint of fifth with liiud margin 

 almost straiglit, posterior angle somewhat produced down- 

 wards ; posterior margin in all serrate and with fine spinules ; 

 remaining joints in all rather slender in specimens examined, 



