26 ART. 1. 1. IJIMA : HEXACTIx^ELLTDA, III. 



apparently fundamentally the same as those seen in Euplectella, 

 are found distributed all over the l)ody. At any rate, the system 

 suffers no disadvantage if the Euplectellinte, consisting-, as it 

 does, of only a single genus, be deprived of its doubtful status 

 as a distinct subfamily ; and moreover, the group resulting from 

 tlie above amalgamation seems to ]je a perfectly natural and well 

 defined one, representing a Euplectellid phylum which has adapted 

 itself to a special mode of attachment to the soft or loose sea- 

 bottom. For this new group or sul)family, the name Enplectellinœ 

 may however 1)0 retained l)ut in a new sense, as follows : 

 Euplectellidse rooted in the substratum by a tuft of 

 1)asal spicules. 



Setting aside the three genera that make up the Euplectellinœ 

 as defined above, the remaining genera (13 in number, vide the 

 list on p. 20) are, assumably all and without exception, those 

 forms which are directly and fii-mly fixed at base to the hard 

 substratum, — prol)al)ly the j^rimitive mode of attachment of the 

 Euplectellidje. 



This assemblage of genera includes all those that were referred 

 to the TtEgerinaî by F. E. Schi^lze, besides others which have 

 been left by him unassigned to any of the subfamilies as being 

 too insufficiently known (F. E. Sch., '87, p. 99). In my last 

 Contribution (Tj., '02, p. 30) I had, for what I considered a 

 necessity l)y nsage, sul)stituted the name Corbitellinœ for that of 

 T^egerina^, to which change I still adhere ; but the scope I had 

 given to the subfamil}^, though on the whole much more extended 

 than before, was in one respect narrowed, viz.y in that the genera 

 Ilertwigia, Trachycaidus and Saccoccdyx, all placed by F. E. 

 Schulze ('99, pp. 90-98) among his Ticgerinjc, were not included 

 in my list of tlie Corbitellintie then given (Lt., /. c). It may 



