THE EUROPEAN SEAS. 



165 



piola, mark those warmer zones which form our 

 Lusitanian region ; south of which, Cranchia, Sepio- 

 teuthis, Loligopsis, Enoploteuthis, and Spirula make 

 their appearance. 



The following tabular arrangement will serve to 

 show both the range of certain genera in latitude, 

 as also the general relations of the Mediterranean 

 Cephalopods to those of the Atlantic. 





Atlantic. 



Medit. 



Southern 

 Ocean. 



Red Sea. 



Octopus . . . 



+ 



4- 



+ 



+ 



Philonexis . . 



+ 



+ 











Argonauta . . 



+ 



+ 











Sepiola . . . 



+ 



+ 



+ 







Rossia. . . . 





+ 



+ 







Sepia .... 



+ 





+ 



+ 



Loligo. . . . 



+ 



+ 









Sepioteuthis 











+ 



Enoploteuthis . 





01 



+ 



+ 



Histioteuthis . 



+ 



+ 











Cheiroteuthis . 



+ 



+ 











No one has as yet undertaken the description of 

 the testaceous fauna of the Mediterranean as a 

 whole, though it is a work which has been long needed. 

 It would be easy enough to compile a list of species 

 out of the works of the several authors and ob- 

 servers already referred to, but this is not what is 

 wanted : either the same eye and the same critical 

 j udgment must be applied to review the whole of 

 the original materials collected and described by 

 these naturalists (for some of the most distinguished 

 amongst them differ widely in the views of specific 



