304 CONCHIFERA. 



natural station in fresh water. And Mr. Garner, in 

 his curious but rather crude paper on the anatomy of 

 Lamellibranchiata (Mag. Nat. Hist. n. s. iii. 303.), 

 ventures to explain this theory by supposing that the 

 animals "kept their valves constantly closed" during 

 the voyage through the sea to the fresh water ! 



" O Lord, how manifold are thy Works ! in Wis- 

 dom hast thou made them all : The Earth is full 

 of thy riches." — Psalm civ. 24. 



