THE BRACHIOPODA. 



399 



Fig. 116.— Lateral view of the viscera of Walrtheimia australis (after Hancock, " On 

 the Organization of the Brachiopoda," " Phil. Trans.," 1858). a, " dorsal " layer 

 of mantle; 6, "ventral " layer; c, anterior walls of the body between the mantle 

 lobes ; d, arms ; p, gullet ; q, stomach with cut biliary ducts of the left side ; r, riffht 

 hepatic mass; s, intestine ending caecally below; i>, so-called " auricles; " o, the 

 right " pseudo-heart," the left being almost wholly removed ; w, pyriform vesicle 

 fixed at the back of the stomach; z, oesophageal ganglia; i,j, adductor; k, divari- 

 cator ; Z, adjustor muscles ; n, peduncles. 



