CRUSTACEA CASPIA. 



377 



Gammarus macntrus, G. 0. Sars. 



Fig. 17. Adult, ovig^ous female, viewed from 



left side. 

 » 18. Superior antenna. 

 » 19. Anterior gnathopod, with coxal plate. 

 » 20. Posterior gnathopod, with coxal plate, 



branchial and incubatory lamellie. 

 » 21. Second pereiopod, with coxal plate. 



Fig. 22. Antepenultimate pereiopod. 

 1) 23. Penultimate pereiopod, without the 



propodal joint. 

 M 24. Last pereiopod, without the outer part. 

 » 25. First uropod. 

 » 26. Last uropod. 

 » 27. Telson. 



PI. XL 

 Gammarus eompressiis, G. 0. Sars. 



Fig. 1. Adult ovigerous female, viewed from 



left side. 

 » 2. Sjperior antenna. 

 » 3. Anterior gnathopod, with coxal plate. 

 » 4. Posterior gnathopod, with coxal plate, 



branchial and incubatory lamellse. 

 » 4aOuter part of the latter, more highly. 



magnified. 



Fig. 5. Second pereiopod, with coxal plate. 

 i> 6. Antepenultimate pereiopod. 

 » 7. Penultimate pereiopod, without the 



outer joints. 

 » 8. Last pereiopod. 

 » 9. Last uropod. 

 » 10. Telson. 



Gammarus similis, G. 0. Sars. 



Fig. 11. Adult, ovigerous female, viewed from 



right side. 

 » 12. Superior antenna. 

 » 13. Anterior gnathopod, with coxal plate. 

 » 14. Posterior gnathopod, with coxal plate, 



branchial and incubatory lamellaa. 

 1) 15. Second pereiopod, with coxal plate. 

 » 1(J. Antepenultimate pereiopod. 



Fig. 17. Basal part of penultimate pereiopod. 

 » 18. Last pereiopod. 

 » 19. Last uropod. 

 » 20. Telson. 

 M 21. Anterior gnathopod of male, with coxal 



plate. 

 » 22. Posterior gnathopod of same. 



PI. XIL 

 Gammarus robustoides, Grimm. 



Fig. 1. Adult, ovigerous female, viewed from 



left side. 

 » 2. Superior antenna. 

 )) 3. Anterior gnathopod, with 'coxal plate. 

 » 4. Posterior gnathopod, with coxal plate, 



branchial and incubatory lamellte. 

 >; 5. Second pereiopod, with coxal plate. 

 » 6. Antepenultimate pereiopod. 

 » 7. Penultimate pereiopod, without the 



outer joints. 

 » 8. Last pereiopod. 

 » 9. First uropod. 



Fig. 10. Last uropod. 



» 11. Telson. 



» 12. Adult male, viewed from right side. 



II 13. Accessory appendage of superior an- 

 tenna. 



» 14. Anterior gnathopod, with coxal plate. 



II 15. Posterior gnathopod, with coxal plate, 

 but without the branchial lamella. 



» 16. Second uropod. 



B 17. Urosome with telson, dorsal view. 



» 18. Dorsal part of urosome, viewed from 

 right side. 



PI. XIIL 

 Gammarus crassus, Grimm. 



Fig. 1. Adult, ovigerous female, viewed from 



left side. 

 » 2. Superior antenna, 

 w 3. Dorsal part of urosome, viewed from 



left side. 

 » 4. Anterior gnathopod, with coxal plate. 

 » 5. Posterior gnathopod, with coxal plate, 



branchial and incubatory lamella?. 

 » 6. Second pereiopod with coxal plate. 



*a3.-MaT. OTp. 357. 36 



Fig. 7. Antepenultimate pereiopod. 



» 8. Penultimate pereiopod. 



» 9. Last pereiopod. 



» 10. Second urop^ d. 



» 11 Last uropod. 



» 12. Telson. 



w 13. Adult male, viewed from right side. 



» 14. Auteiior gnathopod. 



» 15. Posterior gnathopod. 



