THREE NEW SPECIES OF WORISrS BELONGING TO 

 THE ORDER ECHINODERA 



CHAELES H. BLAKE 



Massachusetts Institute of Technology 



EIGHT FIGURES 



The Echinodera are a small group of marine, falsely seg- 

 mented worms. The gronp has recently been the subject of 

 a splendid monograph by Dr. Karl Zelinka ('28). A sum- 

 mary of the species and their distribution is not without 

 interest. All told, Zelinka records twenty-eight species of 

 which the adults are known, forty-eight larval forms which 

 appear to represent additional species, and six species 

 inquirendae. The seventy-six certain species are distributed 

 as follows: 



Species 



The number of species known from any one region is pro- 

 portionate to the study devoted to the region rather than to 

 the actual number of forms present. It will be seen also 

 that the group must be represented on all the coasts of the 

 world. 



In the present paper I am able to announce the presence 

 of three species in the Mount Desert Region (Maine), which 

 have been taken by the Biological Survey of the Mount Desert 

 Region. All the species appear to be undescribed. 



