ANNU^osA. 549 



Division III. Shell rostrated in front. Eight hinder 

 legs alike, and simple. 



Subdivision 1 . Fingers deflexed. 



23. EURYNOME. 24. Parthenope. 



Subdivision 2. Fingers not deflexed. External an- 

 tennae with their first joint simple. Anterior pair of legs 

 distinctly thicker than the rest. 



25. Pisa. 26. Lissa. 



Subdivision 3. Fingers not deflexed. External an- 

 tennae with their first joint simple. Anterior pair of legs 

 scarcely thicker than the others, which are moderately long. 



27. Maja. 



Subdivision 4. Fingers not deflexed. External an- 

 tennae with the first joint simple. Anterior pair of legs 

 about the thickness of the rest, which are very long and 

 slender. 



28. Egeria. 29. Doclea. 



Subdivision 5. Fingers not deflexed. External an- 

 tennae with the first joint externally dilated. 



30. Hyas. 



c. Abdomen in both sexes six Jointed. Two anterior 

 legs didactyle. 



Division I. Fifth pair of legs minute, spurious. 



31. Lithodes. 



Division II. Second, third, fourth and fifth pairs of 

 legs alike, and slender. 



Subdivision 1. Eyes retractile. 



32. Inachus. 



Subdivision 2. Eyes not retractile. 



33. Macropodta. 



D. Abdomen of the male six jointed ; of tlie female jive 

 Jointed ; the last Joint very large. Eyes not retractile. 



34. Leptopodia. 35. Pactoclus. 



