462 



ME. W. E. HOYLE ON THE DEEP-WATER 



Discussion or the Eesults. 



The above Table may be summarized in the more condensed 

 one given below, in which the number of species of each group 

 of animals from each basin is shown. 







Arran Basin. 





d 









bD 

























a 

























o 





















'qq 



c3 



d 









)dick 

 isin. 



reuna 

 isin. 



O 



a c§ 



librae 

 isiu. 



■+3 



p Log 



1 



W 

 g 



-€ 



1* Loc 



ireloc 







§^ 



M 





o 

 H 



Uppe: 



Loci 



Dune 



o 



Uppei 



O 





10 



29 



12 



7 



36 



6 



6 



20 



3 



5 



7 





1 





6 





6 



5 





2 



3 



1 







24 



26 



46 



16 



61 



20 



13 



21 



18 



8 



7 









1 





1 



1 

















31 



1 





31 















Crustacea 



24 



29 



46 



34 



75 



20 



16 



31 



14 



16 



15 





6 



3 



6 





9 



4 



1 



4 



5 



1 



1 



Echinodermata . . . 



3 



12 



12 



6 



18 



8 



5 



13 



6 



6 



3 



Ccelenterata 





26 



5 



1 



27 



3 



1 



2 



2 



1 









7 



4 





8 



2 







3 



1 





Totals 



68 



163 



139 



64 



272 



69 



42 



93 



54 



39 



33 



In dealing with these figures great caution must be observed, 

 and it must always be borne in miud that no locality can ever 

 be said to be really exhausted. The Dumber of dredgings upon 

 which the present inquiry is based will only suffice as a basis 

 for very general conclusions. This has been abundantly evident 

 during the progress o£ the work, for tables like the above have 

 been drawn up several times, and it has been noticed that each 

 successive addition of new data has increased the likeness of the 

 faunas of the different basius to each other. 



Certain sources of error must also be avoided ; for instance, it 

 was apparent, from an examination of the various lists, that the 

 Polyzoa and Hydrozoa had only been exhaustively examined in 



