Clupcoid FisJiea of the Caspian Sea. 479 



nsually absent. Body compressed, deep, its depth 25-30 °/^ 

 of the length of the fish (25-26 °/o = morpha elongata, 28- 

 30 °/Q = morpha elata). 



Total length 200-2G0 ram., rarely 320 mm. 



Caspian Sea, entering Volga Delta. 



10 a. Clupeonella caspia voh/ensis (Meissner). 



Cliipea caspia, var. volyensis, Meissner, in litt. 



Clupennella caspia volffcnsis, iJerg, The Herrings of the Caspian Sea (in 

 Kuss.), 1013, p. 34, tab. v. 



D. IV 13-14 (15). A. Ill 15-19. Sq. 55. Ventral 

 scutes 32-35. Differs from CI. caspia typica in its elongate 

 form (depth 23-2-25'5 °q of the length of the fish), stronger 

 teeth, and more acute snout. External shape very similar 

 to CI. kessleri, from which it differs by more numerous gill- 

 rakers (100-140), &c. Scales deciduous. 



Total length to 387 mm. 



Caspian Sea, entering Volga. 



11. Clupeonella tanaica (Grimm). 



Chipea tanaica, Grimm, ^'iest. Rybopr. 1901, p. G7 (iu Russ.) (Sea of 



Asov). 

 Alosa tanaica, Brauner, Trav. Soc. Xat. Bessarabia, ii. 1912, p. 217. 



Allied to CI. caspia. 



Gill-rakers 58-77. Lower jaw toothless. Body deep. 



Total length to 175 mm. 



Sea of Asov, entering Don. 



12. Clupeonella nordmanni (Antipa). 



Alosa nordmanni, Antipa, Deukschr. Ak. Wien, Ixxviii. 1905, p. 28, 

 Taf. ii. figs. 6-10. 



Replaces CI. tanaica in the west part of the Black Sea. 



Gill-rakers 76-90. Teeth in lower jaw present. Pelvics 

 inserted under origin of dorsal. 



Total length to 200 mm. 



N.W. part of the Black Sea, entering Danube, Dniestr, 

 Dniepr. 



13. Clupeonella grimmi, Kessler. 



Chipeomlla grimmi, Kessler, Fishes of the A ralo-Caspio-Pontical 

 Region, 1877, p. 187 (in Russ.), tab. vi. fig. 24. 



Only voung specimens, up to 45 mm., are known. Gill- 

 rakers 17-30. 



^Middle part of the Caspian Sea. 



Types iu the Zool. Mus. of the Acad. Sc. St. Petersburg. 



33* 



