ECHINODERM LARVAE. 



491 



throughout the whole period of my observations. At 

 least six species of Holothuroidea occur in the neighbour- 

 hood ; and a storm of exceptional violence, which occurred 

 in February, 1902, afforded evidence of the abundance 

 of Synapta digitata at a depth within reach of the action 

 of the waves, by casting up a very large number of speci- 

 mens on the beach. This habitat has not been discovered ; 

 nor does it appear to have been again disturbed by wave 

 action during subsequent storms. The larva of this 

 species is the only local one which has been identified. A 

 small number of specimens of the auricularia (text-fig. 1) 



0-25mnm.. 



Fin. 1. 



and pupa (text-fig. 2) stages were taken by Gravely and 

 myself in July, 1907, and several in the same month of 

 1908. Synapta inhaerens used to occur in muddy gravel 



