28 



E. LÖNNBERG, THE ICHTHYOLOGY OF THE CASPIAN SEA, 



Clupea delicatula Nordmann. 



Total length in mm. 



% of total length: 



Length of head 



Height of bodjr 



Least height of caudal pednncJe . . 



Pra-orbital length 



Postorbital » 



Diameter of eye 



Distance from snoiit to dorsal fin . 

 >■ ) » K ventral fins 



> » » , anal fin . . 



Prfeabdominal length 



Postabdominal » 



Base of dorsal fin 



> ■> anal > 



Length of pectoral fin 



Height of dorsal » 



Length of maxillary 



Number of gillrakers 



95' 



22,1 

 21,0 



8,2 



7,8 

 9,4 

 6,3 

 46,2 

 51,0 

 69,3 

 30,1 

 21,0 

 10,5 

 16,8 



/• g 



Q 

 115 



22,6 

 22,6 



8,6 



7,3 

 10,0 



5,6l 5,5 



Q 9 

 119 120 



22,6 



7,5 



7,5 



10,0 



46! - 



46,9 

 51,3 

 79,1 

 31,3 

 20,0 



15,6 



8,8 



49 



46,2 



52,5 



29,4 

 21,0 



50 



22,5 



20,8 



7,4 



7,5 



10,0 



5,8 



44,1 



51,2 



68,3 



29,5 



18,7 



14,1 



8,5 



Specimens a and c are from Petrovsk, the others from 

 Mangischlak. 



This species which is distinctly separated from the others 

 by its small size and pinkcoloured ova was only observed 

 and colleeted by me at Mangischlak on the Transcaspian coast 

 and Petrovsk. It is quite evident that this form constitntes 

 a sharply defined species which does not attain much greater 

 size than that recorded above. This is proved by the fact 

 that the ovaries were so well developed that the eggs mea- 

 sured fnlly Vs mm. (the 20th of April) and it seemed as if 

 the spawning season was not far distant. Bnt the relative 

 dimensions, which can be seen from the above table, indicate 

 fullgrown animals. Snch a relative measureraent is, for in- 

 stance, the small size of the head which, compared with the 

 total length, gives percentages as low and lower than those 



