PLATE XXVII. 

 Macropueustes spatangoides A. Ao. 



Seen in profile, natural size. 



Another specimen, seen from the abactinal side, natural size. 

 Enlarged view of aetinostome of same. 



Enlarged view of the reticular peripetalous fasciole of the specimen of Fig. 2. 

 Enlarged view of anal system and subanal fasciole of the same. 

 Profile outline of a large specimen, with high posterior extremity, natural size. 

 The same, seen from the abactinal pole ; the apical part of the petaloid ambulacra has become 

 atrophied, as is so frequently the case in allied genera. 



