XI 



capitulum of from 45 to 52 mm. in length and was dredged at depths varying from 204 

 to 450 m. 



As contributing to our knowledge of the geographical distribution of the Cirripedia, it 

 is certainly a remarkable fact that so many as 75 new species should be collected during the 

 cruise of the Siboga. With the addition of these new species and of those which, although 

 already known, were not yet observed in that region, the Sixth Province, which I proposed 

 for the East Indian Archipelago and eastern coasts of India (Challenger-Report p. 33), lias 

 become by far the richest in species. In the said report, I gave a list of the species known at 

 the time (1883) to occur in that province; here follows a list of the genera now known to be 

 represented in that region, showing at the same time how the number of species for each genus 

 has increased since the former list was composed. 



List of the genera of Cirripedia, with number of species, hitherto observed in 

 the East Indian Archipelago and in the waters of South-Eastern Asia. 



Total number of species 



No te. The numbers in brackets refer to species already known, but new to the fauna of the provi 

 * One of these species is descrihed in the present report, although it was Dot collected during the 



210 



nee. 

 cruise of the Siboga. 



