Report on the zoological collections made in the Indo-Pacific Ocean ...

630 COLLECTIONS FROM THE WESTERN INDIAN OCEAN.the presence in the peristome of fine aceratcs ; the triradiates havetheir arms straighter than those figured by Hackel for his species,but their forms and dimensions are about the same in the twospecies.56. Leuconia echinata.Leucandra echinata, Schuffner, JenaiscJi. Zeitschr. xi. p. 411, pi, xxiv.fig. 4.A compressed purse-shaped specimen, with the mouth-openinglost. The outer termination of the acerate is slightly enlarged justbefore the point, forming a hastate apex, not noticed by Schuffner,who only says that the spicule is "unequally pointed at the two ends."The specimen measures 20 millim. in greatest diameter, whereasSehuffner's did not exceed 10 millim.Hah. Darros Island, Amirante group, 22 fms.Distribution. Mauritius {Schuffner).