420 G. 0. SAKS, [t. XIII 



Fig. 4. Extremity of the scale, more highly magnified. 



» 5. Right mandible with palp. 



» 6. Masticatory part of left mandible. 



» 7. First maxilla. 



» 8. Second maxilla. 



» 9. Maxilliped with exopodite and epipodite. 



» 10. Gnathopod. 



» 11. Pereiopod of 2nd pair. 



» 12. Extremity of the latter, more highly magnified, showing the structure of the dac- 



tylar joint. 



» 13. Inner lamella of right uropod (without the marginal setse). 



» 14. Telson, viewed from the dorsal face. 



» 15. Tip of the telson, more highly magnified. 



PI. IV. 

 Mesomysis Kowalevskyi, Czern. 



Fig. 1. Adult female, dorsal view. 



» 2. Front part of the body, with the eyes and antennse, dorsal face. 



» 3. Basal part of left inferior antenna, with the scale (without the marginal setse) and the 



base of the flagellum, dorsal view. 



» 4. Extremity of the scale, more highly magnified. 



» 5. Second maxilla. 



» 6. Pereiopod of 2nd pair. 



» 7. Telson, viewed from the dorsal face. 



» 8. Inner lamella of left uropod (without the marginal setse). 



» 9. Extremity of the telson more highly magnified. 



» 10. Outer part of the tail of an adult male, viewed from left side, exhibiting the pleopoda 



and caudal appendages. 



» 11. Third pleopod of male. 



« 12. Fourth pleopod of same. 



PI. V. 



Mesomysis Czerniavsl'yi, G. 0. Sars. 



Fig. 1. Adult female, dorsal view. 

 a 2. Front part of the body, with the eyes and antennse; dorsal view. 

 » 3. Basal part of left inferior antenna, with the scale (without the marginal setse) and 



the base of the flagellum. 

 » 4. Extremity of the scale, more highly magnified. 

 » 5. Second maxilla. 

 » 6. Pereiopod of 2nd pair. 



» 7. Extremity of the latter, more highly magnified. 

 » 8. Telson, viewed from the dorsal face. 

 » 9. Extremity of the latter, more highly magnified. 



» 10. Inner lamella of left uropod (without the marginal setse). 



» 11. Male appendage of the superior antennse. 



» 12. Third pleopod of male. 



» 13. Fourth pleopod of male. 



PI. VI. 



Mesomysis intermedia, Czern. 



Fig. 1. Adult female dorsal view. 

 » 2. Front part of the body, with the eyes and antennse; dorsal view. 

 » 3. Basal part of left inferior antenna, with the scale (without the marginal setse) and 

 the base of the flagellum. 



Kullotin N. S. IY (XXXVI) p. 72. 



