120 CHAS. W. HARGITT. 



their hydroid, and until this is done the matter must remain an 

 open question. The same objection must be urged concerning 

 a similar inference on the part of Hartlaub, in which he would 

 identify Gegenbaur's Z. costata with that described by the writer 

 at Naples and referred (doubtfully) to Gemmaria implexa. There- 

 fore the attempt to identify and unite Gemmaria with Zanclea 

 must be regarded as unwarranted and inadmissible, and hence 

 premature. 



