CRUSTACEA CASPIA. 



221 



EXPLANATION OF THE PLATES. 



PI. I. 



SoecMa spinosa, Grimm. 



Fig. 1. Adult female, viewed from left side. 



» 2. Same, dorsal view. 



» 3. Left superior antenna. 



» 4. Left inferior antenna. 



» 5. Urosome with its appendages, viewed 



from left side. 



» 6. Telson viewed from above. 



» 7. Last uropod. 



» 8. Anterior lip. 



» 9. Posterior lip. 



Fig. 10. Left mandible with palp. 



» 11. Right mandible, without the palp. 



» 12. First pair of maxillje. 



» 13. Second maxilla. 



» 14. Maxillipeds, without the right palp. 



» 15. Left anterior gnathopod, with the cor- 

 responding coxal plate. 



» 16. Left posterior gnathopod, with the cor- 

 responding coxal plate, branchial and 

 incubatory lamellse. 



PI. IL 



Boeckia spinosa, Grimm, 

 (continued). 



Fig. 1. Adult male, dorsal view. 



» 2. Left anterior gnathopod, with the cor- 

 responding coxal plate. 



» 3. Left posterior gnathopod, with the cor- 

 responding coxal plate and branchial 

 lamella. 



» 4. Second pereiopod with the correspond- 

 ing coxal plate. 



Fig. 5. Antepenultimate pereiopod, with coxal 

 plate and branchial lamella. 

 » 6. Penultimate pereiopod. 

 » 7. Last pereiopod. 

 » 8. Second uropod. 

 » 9. Last uropod. 



» 10. A very young specimen, viewed from 

 left side. 



PI. in. 



GmeUna costata, Grimm. 



Fig. 1. Adult female, viewed from left side. 



» 2. Cephalon with the base of the left in- 

 ferior antenna, lateral view. 



» 3. Part of the right superior antenna, 

 showing the accessory appendage and 

 the base of the flagellum. 



» 4. Anterior lip. 



» 5. Posterior lip. 



» 6. Right mandible, without the palp. 



» 7. Left mandible with palp. 



)) 8. First maxilla. 



» 9. Second maxilla. 



» 10. Maxillipeds, without the right palp. 



Fig. 11. Left anterior gnathopod, with the cor- 

 responding coxal plate. 



» 12. Left posterior gnathopod. 



» 13. Last pereiopod. 



» 14. Second uropod. 



1) 15. Last uropod. 



» 16. Telson, from above. 



17. Adult male, viewed from right side. 



« 18. Same, dorsal view. 



» 19. Right anterior gnathopod. 



» 20. Right posterior gnathopod. 



» 21. First uropod. 



» 22. Last uropod. 



PI. IV. 

 GmeUna Kusnezowi, (So win sky). 



Fig. 



1. Adult female, viewed from left side. 



2. Cephalon with the base of the left in- 

 ferior antenna, lateral view. 



3. Part of the right superior antenna, 

 showing the accessory appendage and 

 the base of the flagellum. 



$H3.-MaT. CTp. 221. 43 



Fig. 4. Left anterior gnathopod, with part of 

 the corresponding coxal plate. 



n 5. Left posterior gnathopod. 



» 6. First pereiopod. 



» 7. Antepenultimate pereiopod, with coxal 

 plate. 



