FRESHWATER MUSSELS 69 



(lamella = sheet ; branchia = gill), or sometimes as Pelecypods 

 (Greek, pelekus = axe ; pous = foot). 



BIBLIOGRAPHY. Cambridge Natural History, vol iii. ; Shipley and MacBride, 

 Zoology ; Lionel Adams, Collectors' Manual of British Land and Freshwater Shells ; 

 Latter, Natural History of some Common Animals ; Hatchett Jackson, Forms of 

 Animal Life (Rolleston) ; Howes, Atlas of Practical Elementary Biology ; Jeffrey 

 Parker, Elementary Biology ; Marshall and Hurst, Practical Zoology. 



