CORRIGENDA. 



(See also page 129.) 



p. 37, line 34, for it apparently altogether disappears read 

 they apparently altogether disappear, 

 p. 40, hne 35, right hand column, for stomach read siphon. 

 42, line 35, insert comma after E. siliqua, and delete the word and 

 before, and the comma after, Cultellns pellucidus. 

 p. 82, line 26, for protuding read protruding, 

 p. 102, line 17, for more conspicuous read less conspicuous. 



