15 



Museum. Var. tubulodigitata^ registered Herdman Coll. '07. 2. 1. 27 corresponds to my number 



B.M. 17; var. fungoides, '07. 2. 1. 25 to B. M. 19 and var. gallensis, '07. 2. 1. 26 to B.M. 14. 



According to Ridley the species is "nearly allied to Hymeniacidon angulata of 



Bowerbank but has a skeleton-spicule of twice the diameter of the spinulate found in 



that species". Ridley further states that "the spicules show 110 striking variation in size; the 

 length of the spinulate varies from .55 to .63 millim. in different specimens; its breadth and 

 the size of the fiesh-spicule are almost constant". These statements can hardly be kept, as the 

 followingf table shows. 



Now I hnd the following variation in the three specimens of Hymeniacidon angulata : 



Consequently I believe it is impossible to distinguish 5. vagabunda specifïcally from 

 H. angulata ; at least not on account of the size of the tylostyles, after all the only distinction 

 on which Ridley based the difference. 



The examination of specimens in the British Museum especially B. M. 17 and B. M. 24 

 showed me that the Siboga specimens 948 a-f are identical with them, agreeing as they do in 

 external appearance as well as in spiculation and structure. 



[Cf. 5. congenera and punctulata\. 



XIII. Suberites wilsoni. 



18S5 Carter p. 113 — 114. 

 1886 Carter p. 116. 

 i8S9(«) Dendy p. 24. 

 1897 Dendy p. 247. 



Clioua wilsoni. 



