488 



0. 0. SARS, 



Gammarus tenellus, G. 0. Sars. 



Fig. 12. Adult female, seen from right side. 



» 13. Part of superior antenna, with the ac- 

 cessory appendage and the base of the 

 flagellum. 



1) 14. Anterior gnathopod. 



» 15. Posterior gnathopod, with coxal plate, 

 branchial and incubatory lamellae. 



B 16. Second pereiopod with coxal plate. 



» 17. Antepenultimate pereiopod. 



Fig. 18. Penultimate pereiopod, without the 

 outer joints. 

 Last pereiopod. 

 Last uropod. 

 Second uropod. 

 Telson. 



Anterior gnathopod 

 coxal plate. 

 Posterior gnathopod of same. 



I'.i. 

 20. 

 21. 

 22. 

 23. 



24. 



of male, with 



PI. 8. 

 Gammarus placidus, Grimm. 



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

 » 2. Cephalon, without antennae and oral 



parts; lateral view. 

 » 8. Part of superior antenna. 

 » 4. Anterior gnathopod, with coxal plate. 

 » 5. Posterior gnathopod, with coxal plate, 



branchial and incubatory lamelliB. 

 » 6. Second pereiopod, with coxal plate, 



branchial and incubatory lamellae. 



Fig. 7. Proximal part of antepenultimate 



pereiopod. 

 » 8. Penultimate pereiopod, without the 



outer joints. 

 )) 9. Last pereiopod. 

 » 10. Second uropod. 

 » 11. Last uropod. 

 » 12. Telson. 



Gammarus platyeheir, G. 0. Sars. 



Fig. 14. Adult male, seen from left side. 

 » 15. Outer part of superior antenna. 

 w 16. Posterior gnathopod. 



Fig. 17. Extremity of urosome, with left last 

 uropod and telson; dorsal view. 



Fig. 



Fig. 



1. Adult male, seen from left side. 



2. Superior antenna. 



3. Inferior antenna. 



8 (bis). Mandibular palp. 



4. Anterior gnathopod of female, with 

 coxal plate. 



5. Posterior gnathopod of 'same, with 

 coxal plate, branchial and incubatory 

 lamellse. 



PI. 9. 



Gammarus Weidemaimi, G. 0. Sars 

 Fig, 



6. Second pereiopod. 



7. Antepenultimate pereiopod. 



8. Penultimate pereiopod. 



9. Last pereiopod. 



10. Last uropod. 



11. Telson. 



Gammarus maeoticus, Sowinsky. 



12. Adult male, seen from right side. 



13. Superior antenna. 



14. Inferior antenna. 



15. Mandible with palp. 



16. Anterior gnathopod of male, with coxal 

 plate. 



Fig. 17. Posterior gnathopod of same. 

 » 18. Second uropod. 

 » 19. Last uropod. 

 )> 20. Telson. 



PI. 10. 

 Gammarus pauxillut, Grimm. 



Fig. 



1. Adult female, seen from left side. 



2. Superior antenna. 



3. Inferior antenna. 

 Anterior gnathopod, with coxal plate. 

 Posterior gnathopod, with coxal plate, 

 branchial and incubatory lamellse. 

 First pereiopod. 

 Coxal plate of 4th pair. 

 Antepenultimate pereiopod (outer part 

 not drawn). 



Penultimate pereiopod, without the 

 outer joints. 



Last pereiopod. 



Urosome of male, seeu from loft side. 



Last uropod of female. 



Telson. 



Adult male, seen from left side. 



Cephalon of same, without antennae 



and oral parts; lateral view. 



Anterior gnathopod of same, with coxal 



plate. 



Posterior gnathopod. 



^Ha.-MaT. crp. 318. 



68 



