EXPLANATION OF THE PLATES. 



Fig. 1. 



2. 



2 a. 



3. 



4. 



5. 



6. 



7. 



8. 



9. 

 10. 

 11. 

 12. 

 13. 

 14. 

 15. 

 16. 

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 18. 

 19. 

 20.- 

 21. 



Fig. 22. 



» 23. 



» 24. 



» 25. 



PI. L 



Stj}iopla ultramarina. Dana. 



The animal seen from the side. ^. C^/i)- 

 One of the first pair of auteunse. cJ. (^-/i)- 



» » » second ]>air of antenu?e. (^. (^-/i)- 

 The secondary ilagelhim of the first pair of antennae. <S. C^Vi)- 

 A piece of the kibrnm. ^. (^^/,). 

 The right mandible, (^e/,). 



A piece of the snrface of the molar tubercle of the mandible. (^^Vi)- 

 A bifid spine from the excavation of the mandible. (-^Vi)- 

 The right one of the first pair of maxillae, (^^/i). 

 The left one of the second pair of maxillae. (^Vi)- 

 A spine from the same. ("Vi)- 

 The left maxilliped. (^V,). 

 One of the first pair of pereiopoda 



third 



fourth 



fiftii 



sixth 



seventh 



rv.) 



(*Vi) 

 (*Vi) 



An ovitectrix from the fifth segment. ("Vi)- 

 One of the first pair of pleopoda. (*Vi)- 

 A hair from the preceding. (^^Vi)- 

 The urns. (*V,)- 



PI II. 

 Sijnopia Sckeeleana. N. sp. 



The animal seen from tlic side. ('Vi)- 



One of the first pair of antenme. 



» » » second » » » 



» » » fir.st » » pereiopoda. (*^/i)- 



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