376 



G. 0. SARS, 



The last pair of uropoda (fig. 20) are comparatively short and stout, hut 

 little projecting beyond the others. The basal part is rather thick and armed 

 at the end below with a transverse row of strong spines. The inner ramus 

 is very small and scale-like carrying, at the tip a single spine. The outer ra- 

 mus is scarcely twice as long as the basal part and somewhat flattened, being 

 fringed in its outer part with long, ciliated setse, and having besides, about 

 in the middle outside, 2 strong juxtaposed spines. The terminal joint is ex- 

 tremely small, nodiform. 



The telson (fig. 21) consists of 2 slightly diverging lobes of nearly equal 

 breadth throughout, each armed, on the obtusely truncated tip, with 3 strong 

 spines increasing in length outwards. 



Occurrence. — A few specimens of this form were collected by Mr. 

 Warpachowsky at Stations 63 and 64, both lying in the eastern part of 

 the North Caspian Sea. 



Dr. Grimm has collected the species in 3 different Stations, one belong- 

 ing to the southern part of the Caspian Sea, the other 2 to the middle 

 part, the depth being from 35 to 40 fathoms. 



EXPLANATION OF THE PLATES. 



PI. IX. 

 Gammarus Warpacliowskyi, G. 0. Sars. 



Fig. 1. Adult, ovigerous female, viewed from 

 left side. 



1) 2. Ccplialon, from left side. 



» 3. Superior antenna. 



» 4. Inferior antenna. 



» 5. Anterior gnathopod, with the corre- 

 sponding coxal i>late. 



» G. Pcislerior guathopnd, witli coxal plate, 

 branchial and incubatory lamellfe. 



» 7. Second pcreiopod, with coxal plate. 



» 8. Ante|)cnultimate pereiopod. 



)> 9. Penultimate pereiopod. 



Fig. 10. Last pereiopod. 

 » 11. First uropod. 

 » 12. Second uropod. 

 » 13. Last uropod. 

 n 14. Telson. 



>} 15. Adult male, viewed from right side. 

 )) Hi. Inferior antenna of same. 

 1) 17. Anterior gnathopod. 

 u 18. Posterior gnathopod. 

 « 19. Urosome, without the uropoda, viewed 

 from right side. 



PI. X. 



Gammarus minutun, G. 0. Sars. 



Fig. 1. Adult, ovigerous female, viewed from 



left side. 

 » 2. Superior antenna. 

 M 3. Inferior antenna. 

 » 4. Anterior gnathopod, with coxal 



plate. 

 » 5. Posterior gnathopod, with coxal plate, 



branchial and incubatory lamellae. 

 » 6. Second pereiopod, with coxal plate. 

 » 7. Antepenultimate pereiopod. 



•tna.-MaT. cip. 356. 34 



Fig. 8. Penultimate pereiopod. 

 M 9. Last pereiopod. 

 » 10. Second uropod. 

 •> 11. Last uropod. 



» 12. Adult male, viewed from right side. 

 )) 13. Anterior gnathopod of same, with cox- 

 al plate. 

 » 14. Posterior gnathopod, with coxal plate. 

 » 1.5. Last uropod. 

 H IG. Telson. 



