OF CONCHOLOQY. 283 



REVIEWS. 



I.— AMERICAN 



Proceedings of the Essex Institute. IV. No. 8. Salem, Mass. 

 June 2, 1866. 



Observations on Polyzoa; Suborder Phylactolcemata. BY 

 ALPHEUS HYATT. 



A very important paper, containing microscopical observa- 

 tions on the genera of American Fresh- water Polyzoa, (Bryozoa,) 

 — their structure and reproduction. Mr. Hyatt is the only 

 American author, except Dr. Leidy, who has investigated into 

 the history of this but little-known class of Mollusca. The 

 paper is illustrated by several plates, drawn with that skill and 

 finish which so eminently characterizes the pencil of Edward 

 S. Morse. 



