AND THE FISH THEREOF. 



35 



The third, or submerged littoral zone is the richest in animal, as it is also 

 in vegetable, life, two-fifths of the above species being common to, one-fifth 

 being exclusively found in, and one-seventh being characteristic of, this zone. 



The relative figures are : — 



Of those which have an "extended" vertical distribution in the Quarnero, 

 there are 36 whose horizontal distribution are known ; of these 8 have a 

 "limited" extension (only Mediterranean), whereas 28 are known to have an 

 "extended" horizontal distribution; of those which are limited to one zone, 

 59 are known to have a "limited,' 1 and 71 to have an "extended" horizontal 

 distribution. 



If, however, the Celtic-Lusitanian region l be comprised within the 

 denomination " limited distribution" thus drawing- into one region the Medi- 

 terranean, the Celtic-Mediterranean, the Celtic-Lusitanian and the Canary- 

 Lusitanian regions combined, as against the Lusitanian, Celtic and Boreal 

 regions, as representing the "extended" distribution, we find :— 



I11 the first instance (as above stated), — horizontal distribution, 



limited extended 



extended vertical distribution in the Quarnero 8 28 



limited to one zone 59 71 



univalves, 191 bivalves, 369 crustaceans, and 311 vermes as belonging to the Adriatic fauna. 

 See Appendix No. 5. 



1 The regions are according to the map in the "Nat. Hist, of the European Seas." 



F 2 



