EMBRYONIC AND LARVAL HISTORIES 61 



of the ordinary Cirripedes or Barnacles, being met 

 with nowhere else. In the ordinary Barnacle the 



Fig. 11. Development of Sacculina neglecta. A. Nauplius stage, 

 x about 70. B. Cypris stage, x about 70. A lt A 2 , 1st and 2nd 

 antennae of Nauplius; Ab. abdomen; Ant. antenna of Cypris; 

 E. undifferentiated cells; F. frontal horn; G. glands of Cypris; 

 H. tendon of Cypris ; M. mandible ; T. tentacles. 



Cypris larva proceeds to fix itself by its antenna to a 

 rock or some floating object, and by a series of stages 

 it becomes metamorphosed into the adult sessile 



