^ 



\s. 



'^i 





f 



of N 



Irif^ 



M 



^k 





f 



1 



S«rd^ 



■ ^i tie 



f""i« of 



frapn 



^ofbatei' 



■^••MtoliaTe 



^orb of art 



ies, tte 



d tog?tlier, I 





k.Ai 



ttom of tie 

 bore its former 



" P::^- Pliocene 

 - * - antiquity 



piobibletliit 



J*^ in *d 



■^ ■ This 



Itffli (1 



'1 W"^' 



» 







n 



565 



CHAPTER XLYIII. 



IMBEDDING OP AQUATIC SPECIES IN SUBAQUEOUS STRATA. 



INHUMATION OF FEESHWATER PLANTS AND ANIMALS — SHELL-MARL FOSSI- 

 LISED SEED-VESSELS AND STEMS OF CHARA— RECENT DEPOSITS IN AMERICAN 

 LAKES — FRESHWATER SPECIES DRIFTED INTO SEAS AND ESTUARIES — LEWES 

 LEVELS— ALTERNATIONS OF MARINE AND FRESHWATER STRATA, HOW CAUSED 

 ■IMBEDDING OF MARINE PLANTS AND ANIMALS— CETACEA STRANDED ON OUR 

 SHORES— LITTORAL AND ESTUARY TESTACEA SWEPT INTO THE DEEP SEA 

 BURROWING SHELLS— LIVING TESTACEA F(;UND AT , CONSIDERABLE DEPTHS 

 BLENDING OF ORGANIC REMAINS OF DIFFERENT AGES. 



Hayino treated of the imbedding oi 

 animals, and of human remains, in 



formin 



beneath the waters, I come next to consider m what manner 

 aquatic species may be entombed in strata formed in their 



own element. 



Freshwater plants and animals. — The 

 belonging to those genera of the animal and vegetable 



remains 



kingdoms which 



more 



exclnsively confined to 



of marine races. 



fresh water are for the most part preserved in the beds of 

 lakes or estnaries, but they are oftentimes swept down by 

 rivers into the sea, and there intermingled with the exuviae 



The phenomena attending their inhumation 

 in lacustrine deposits are sometimes revealed to our observ- 

 ation by the drainage of small lakes, such as are those in 

 Scotland, which have been laid dry for the sake of obtain- 

 ing shell-marl for agricultural uses. 



modern formations 



marl are sometimes 



from 



marl 



Limnea 



of species now existing in Scotland. A considerable proportion 

 of the Testacea appear to have died very young, and few of 



/ 



