86 CELTIC PROVINCE. 



The first concerns colour, in its relation to depth. 



COLOR. 



ALGM. 



PROFUNDITAS. 



Radii violacei 

 „ cyanei 

 „ ccerulei 



„ virides 



„ flavi . . 

 „ aurantiaci 



„ rubri . . 



"J Algae viridicoerules- "J 

 > centes > 

 J (Oscillatorinecs J 

 J Algae virides 1 

 \ (Cldorospermece) \ 

 J Algae olivaceae \ 

 \ (Melanospermece) j 

 f Algae purpureae \ 

 \ (Rhodospermea) J 



Superficies 



Ped. 10—25 

 Ped. 25—50 

 Ped. 50—65 



The second exhibits the influence of sea-compo- 

 sition, intensity of light, and motion of the water 

 upon the three groups of green, red, and olive sea- 



Maris < 



Salsitudo 



Profundi tas 



( magna — Rhodospermece. 

 . J minor — Melanospermece, 

 ( minima — CMorospermeie . 



1. . . x ( magna — Chlorospermece. 

 mtensitas 1 . n/r , 



, . ■< minor — Melanospermece. 



(minima — Rhodospermece. 



, f magna — Chlorospermece. 



undarum J minor —Melanospermece. 



violentia l m [ n i ma _ Modosperme(e . t 



M. Oersted, after having described his vegetable 

 zones, then proceeds to constitute three zones of 

 animal life. The first is the Regio trochoideorum, 

 ranging from the shore sea-mark to 7 or 8 fathoms. 

 He remarks that the shells of the testacea in this 

 province are strong, in order to endure the force of 

 the waves ; those that have no shells can hide or 

 bury themselves. Its inhabitants are, for the most 

 part, phytophagous animals. It may be separated 



