394 G. H. PARKER 



smaller suckers than for the larger ones. But even in the smaller 

 suckers it is well under the theoretical maximum and falls 

 far short of the efficiency of the sucking organs of such animals 

 as the sea-anemone Cribrina (Parker, '17), which can exert a 

 pressure of about one atmosphere. 



LITERATURE CITED 



Parker, G. H. 1917. The power of suction in the sea-anemone Cribrina. Jour. 

 Exp. ZooL, vol. 24, pp. 219-222. 



