200 G. O. Sars. 
Plater: 
Fig. 1—26. 
Porcellana longicornis, (Lin.) 
Fig. 1. Youngest larva observed; lateral view. 
« 2. The same; dorsal view. 
. 3. First antenna of the same stage. 
« 4. Second antenna. 
« 4a. Extremity of the flagellum from same antenna, 
more highly magnified. 
5. Anterior lip. 
6. Posterior lip. 
« 7. Mandibles. 
8. First maxilla, 
9. Second maxilla. 
« 10. First maxilliped. 
« 11. Second maxilliped. 
« 12. Third maxilliped. 
« 13. Posterior cephalothoracie appendages (third maxil- 
liped and legs) of the right side, viewed from the 
inner face. 
« 14. Extremity of tail with the caudal plate; dorsal 
view. 
« 14a. The outer marginal spine of same, more highly 
magnified. | 
« 15. Last larval stage; dorsal view. 
« 16. The same; lateral view. 
« 17. First and second antenna of the same stage. 
« 18. First maxilla. | 
« 19. Second maxilla. 
« 20. First maxilliped. 
« 21. Second maxilliped. 
« 22. Third maxilliped. 
