630 COLLECTIONS FEOM THE WESTEEN INDIAN OCEAN. 



the presence in the peristome of fine acerates; the triradiates have 

 their arms straighter than those figured by Hackel for his species, 

 but their forms and dimensions are about the same in the two 

 species. 



56. Leuconia echinata. 



Leucanclra echinata, Schuffner, Jenaisch. Zeitschr. xi. p. 411, pi. xxiv. 

 fig- 4. 



A compressed purse-shaped specimen, with tho mouth-opening 

 lost. The outer termination of the acerate is slightly enlarged just 

 before the point, forming a hastate apex, not noticed by Schuffner, 

 who only says that the spicide is "unequally pointed at the two ends." 

 The specimen measures 20 millim. in greatest diameter, whereas 

 Schuffner's did not exceed 10 millim. 



Hab. Darros Island, Amirante group, 22 fms. 



Distribution. Mauritius (ScJmffner). 



