Survey of the Animal Kingdom 313 



Mantle cut frez 



Perkardlai cavity Rectum 



Ant. retractor 



Anterior i 

 adductor i 



Poit. retractor 

 Po5t. adductor 

 £.x. siphon 



In. siphon 



Protractor Ext. labial palp Left qill plate 



Fig. 120. — Fresh water clam {Lampsilis anodontoides) with the left mantle 

 partially removed and turned back to expose the underlying organs. (From 

 Potter: Textbook of Zoology, The C. V. Mosby Co.) 



Pericardial \\/a\l Reno -pericardial pore 

 Post, aorta I Ventricle [ Excretory pore 

 Vertical ^^^^- odductor M. ! ! AuUle 1 i Ant.aorta Liver 



water tubes 



Exholant 

 Siphon 



I Hidn(2y 



stomach \ cerebral 



commissure 



[ Ant. adductor 

 muscle 



Inhalant 

 siphon 



» Oill 

 Mantle ^^^^^ 



Visceral Q. 



Labial 



Qonad \ I root \ '^'^''^^ ^^'^'^ 



Intestine Pedal Q. Cerebro pleural G-. 



Fig. 121. — Fresh water clam (Lampsilis anodontoides) showing internal organs, 

 (From Potter: Textbook of Zoology, The C. V. Mosby Co.) 



