DESCRIPTIONS OF PLATES. 



PLATE 1. 



Leodice longicirrata Webster. 



1. Entire animal, xl. 5, Ball del. 



2. Head, x6, Ball del. 



3. Somites 40 and 41, x6, Ball del. 



4. Pygidium, x6, Ball del. 

 Leodice wiifrons Verrill. 



5. Entire animal, x2, Ball del. 



6. Head, x6, Ball del. 



7. Somites 64 and 65, x6, Ball del. 



8. Pygidium, x6, Ball del. 



9. Gill-bearing somite, x6, Fernald del. 

 Leodice stigmatura Verrill. 



10. Entire animal, x2, Ball del. 



11. Head, x4, Ball del. 



12. Middle somites, x4, Ball del. 



13. Pygidium, x4, Ball del. 

 Leodice filamentosa Grube. 



14. Entire animal, xl, Ball del. 



15. Head, x4, Ball del. 



16. Somites from region of seventy-fifth, Ball del. 



17. Pygidium, x4, Ball del. 

 Leodice rubritiltata Treadwell. 



18. Entire animal, x4, Ridgway del. after sketch by 



Gay. 



PLATE 2. 



Leodice rubra Grube. 



1. Entire animal, x3, Ball del. 



2. Head, x6, Ball del. 



3. Middle somites, x6, Ball del. 



4. Pygidium, x6, Ball del. 

 Leodice longisetis Webster. 



5. Entire animal, xl.5, Ball and Morita del. 



6. Head, x3, Morita del. 



7. Middle somites, x3, Ball del. 



8. Pygidium, x3, Ball del. 

 Leodice guanica Treadwell. 



9. Anterior end, x6, Rowland del. 



10. Head of smaller individual, x6, Rowland del. 



11. Middle somites, x6, Rowland del. 



12. Pygidium, x6, Rowland del. 

 Leodice culebra Treadwell. 



13. Entire animal, x3, Fernald del. 



14. Head, x6, Fernald del. 



15. Middle somites, x6, Fernald del. 



16. Pygidium, x6, Fernald del. 



PLATE 3. 



Leodice denticulata Webster. 



1. Entire animal, xl, Ball del. 



2. Head, x4, Ball del. 



3. Middle somites, x4, Ball del. 



4. Pygidium, x4, Ball del. 

 Leodice mutilata Webster. 



5. Entire animal, xl.5, Ball del. 



6. Head, x6, Ball del. 



7. Forty-fourth and forty-fifth somites, x6, Ball del. 



8. Pygidium, x6, Ball del. 



PLATE 3 Continued. 

 Leodice binominata Quatrefages. 

 9. Entire animal, x2, Ball del. 



10. Head, x4, Ball del. 



11. Middle somites, x4, Ball del. 



12. Pygidium, x4, Ball del. 



PLATE 4. 

 Leodice cariboea Grube. 



1. Entire animal, xl, Ball del. 



2. Head, x4, Ball del. 



3. Middle somites, x4, Ball del. 



4. Pygidium, x4, Ball del. 

 Leodice fucata Ehlers. 



5. Entire animal, xl, Ball del. 



6. Head, x2, Ball del. 



7. Middle somites, x2, Ball del. 



8. Egg-bearing somites, x2, Ball del. 



9. Pygidium, x2, Ball del. 



10. Posterior end of egg-bearing female, x3, Morita 



del. 

 Leodice tennis Treadwell. 



11. Animal lacking pvgidium, xl, Ball del. 

 Leodice notata Treadwell. 



12. Entire animal, x3, Gay del. 

 Lysidice sulcata Treadwell. 



13. Entire animal, xl, Ball del. 



14. Head, x6, Ball del. 



15. Pygidium, x6, Ball del. 



PLATE 5. 

 Marphysa acicularum Webster. 



1. Entire animal, xl, Fernald del., Bermuda speci- 



men. 



2. Head, x4, Ball del., Tortugas specimen. 



3. Middle somites, x4, Ball del., Tortugas specimen. 



4. Pygidium, x4, Ball del., Tortugas specimen. 

 Marphysa acicularum var. brevibranchiata Treadwell. 



5. Entire animal, xl, Fernald del., Bermuda speci- 



men. 



6. Head, xl.6, Fernald del., Bermuda specimen. 



7. Middle somites, xl.6, Fernald del., Bermuda 



specimen. 



8. Pygidium, xl.6, Fernald del., Bermuda specimen. 

 Marphysa regalis Verrill. 



9. Entire animal, x3, Rowland del., Porto Rico 



specimen. 



10. Head, x4, Ball del, Tortugas specimen. 



11. Middle somites, x4, Ball del., Tortugas specimen. 



12. Pygidium, x4, Ball del., Tortugas specimen. 

 Marphysa belli Audouin et Milne Ed. var. oculata 



Treadwell. 



13. Entire animal, x3, Weber del. 



14. Gill-bearing somites, x6, Weber del. 



PLATE 6. 

 Marphysa mridis Treadwell. 



1. Entire animal, xl.5, Weber del. 



2. Head, x3, Weber del. 



3. Middle somites, x3, Weber del. 



4. Pygidium, x3, Weber del. 



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