484 0. 0. SARS, 



The last pair of pereiopoda (fig. 22) have the basal joint expanded iu 

 the usual manner and densely clothed with long ciliated settc on botli edges. 

 The outer joints are rather slender and are partly armed with short spines 

 in addition to tlie usual bristles. 



The 2 anterior pairs of uropoda (see tigs. 22, 23) arc very densely 

 supplied with spines both on tlie basal part and the rami, their number 

 being considerably greater than in G. ckelicorne. 



Tlie last pair of uropoda (fig. 24) are likewise distinguished by the pre- 

 sence of a number of spines on the lamellar terminal joint, which also 

 carries the usual slender setse. 



The telson (fig. 25) exhibits a shape similar to that in the other species, 

 but is prominently distinguishable by the presence of a rather conspicuous 

 erect spine on each side of its base, not found in any of the other species. 



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

 in the southern part of the Caspian Sea, from a depth of 25 fathoms. 



List of Caspian Amphipoda 



up to the present more closely examined. 



(With statementa of additional localities). 



1. Pseudalibrotus caspius, Grm. 



2. » platyeeras, Grm. 



3. Pontoporeia microphthalma, Grm. 



4. Boeclcia spinof^a, Grm. St. 65, G7 (Warpachowsky). 



5. Gmelina eostata, Grm. St. 78 (Warp.), sin. Ivarabugas. 



6. » iuiine^ow;', Sowinsky. St. 93 (Warp.). 



7. » leeviuseula, G. 0. Sara. 



8. » pusilla, G. 0. S. 



9. Gmelinopsis tuberculata, G. 0. S. 



10. » aurita, G. 0. S. 



11. GammaracantJius caspius, Grm. 



12. Amathillina cristaia, Grm. St. 63, 69, 78, 83 (Warp.); ott' tlie mouth of Terek (Kusnezow). 

 18. » spinosa, Grm. 



14. » a/finis, G. 0. S. Sin. Karahugas. 



15. » Maximowiczi, G. 0. S. 

 10. » pusilla, G. 0. S. 



17. Gammarus caspius, Eichw. St. 78 (Warp.), Krasnowodsk, sin. Karabugas. 



18. » hamohaphes, Eichw. St. 6.5, 67, 69, 75, 83, 86 (Warp.), Krasnowodsk, sin. Kara- 



bugas, off the mouth of Terek. 



19. » Grimmi, G. 0. S. 



20. » subnudus, G. 0. S. 



21. » macrocephalns, Grm. 



22. » teneVus, G. 0. S. 



23. » placidus, Grm. 



■I'lls.-SLiT. CTp. 3ii. 64 



