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CHAS. W. HARGITT. 



his well-known genus Gemmaria. Fig. 6, copied from Murbach's 

 figure of Corynitis, confused by him with the very different genus 

 of this name, gives a good picture of the medusa of Gemmaria 

 gemmosa, to be discussed in the following section. Likewise, 

 Fig. 7, from the writer's description of Gemmaria implexa, also 

 shows beyond doubt the distinctive gemmarian features. 



With these figures, and facts cited bearing upon the problems 

 concerned, there can hardly be reasonable doubt as to the con- 

 clusions to be drawn. Syncoryne 

 linvillei must be identified with 

 the genus Corynitis; and the 

 Corynitis of later literature must 

 be identified with the genus Gem- 

 maria of McCrady. 



It is therefore to be hoped that 

 the long-standing confusion here 

 referred to may be once for all 

 removed by recognition of the 

 facts as given. And while it is 

 too much to anticipate that simi- 

 lar confusion along kindred lines 

 may be avoided entirely, the les- 

 sons of past experience should 

 count for something in rendering 

 their occurrence less frequent, or 

 of such persistence. 

 Gemmaria. — Attention has been directed to the confusion of 

 McCrady's Gemmaria with his very different genus Corynitis. 

 A similar confusion has also been more or less current as to the 

 relations of Gemmaria and Zanclea. The latter was instituted 

 by Gegenbaur for a medusa found at Messina, and recognized by 

 McCrady as having certain points of similarity to his doubtful 

 Gemmaria, which he believed however, to be quite generically 

 distinct from Zanclea. 



Having taken a medusa at Woods Holl during several years 

 which is now well known as identical with McCrady's Gemmaria, 

 and having kept these medusae at various times and for consider- 

 able periods in the laboratory, I am convinced that they are beyond 



Fig. 7. Gemmaria implexa. 

 (Naples.) 



