THE BIOLOGY OF AN ANIMAL. 



FIG. 24. Dorsal view of the anterior part of the body of I/umbrfctw, as it appears 

 when laid open along the dorsal aspect, ao, aortic arch ; c, crop ; c.g, cerebral 

 ganglia; c.gl, calciferous glands; d, dissepiment; d.r, dorsal vessel; 0, gizzard ; 

 (B, 03sophagus ; ph, pharynx ; ps, prostomium ; s.i, stomach-intestine, showing 

 the lateral pouches; s.r, seminal receptacles; ..*, s.u. 1 , 8.r., the three pairs of 

 lateral seminal vesicles. 



