46 NATURAL HISTORY OF 



mutual pressure, set in single series." Mr. Gosse 

 states that he saw one of them open the head lobe and 

 unfold it in the form of a broad shovel-shaped expanded 

 disc. This form was first discovered by Mr. Gosse in 

 1855, and was not observed afterwards till 1872, when 

 it came under the notice of Mr. Hincka. Mr. Gosse 

 published a memoir on it in the Trans. Linn. Soc, xx. 

 113 j and Mr. Hincks published a paper on it in the 

 A. and M. of N. H., November, 1872. 



FAMILY Y. COEYNID^. 



Polypites with capitate tentaciila scattered or in several 

 whorls.— T. H. 



Prof. Allman, who, as before stated, bases the 

 characteristics of his families upon the method of 

 reproduction as well as the appearance of the polypite, 

 divides the Gorynidce of Hincks into two families, 

 namely, Gorynidce, comprising the genus Coryne, in 

 which the reproduction is by fixed sporosacs, and 

 Byncorynidce, comprising the genera Syncoryne, Gym- 

 nocoryne, and Zanclea, in which reproduction is by free 

 medusee. 



Genus I. Coryne, Gaertner. [Kopvvr], a club.) 



Stem simple or branched, rooted by a creeping fili- 

 form stolon, the whole sheathed in a thin chitinous 

 tube smoothed or annulated. Polypites terminal, with 

 tentacles as described above. Reproduction by fixed 

 sporosacs on the body of the poljpite. — T. H. 



1. C. PusiLLA, Gaertner, Plate IIL fig. 2. 



Syncoryne pusilla {Ehr.), Syncoryna Listerii (F. B.), 

 C. glandulosa {Dal., Lh.), C. ramosa {Aid.), C. sessilis 



