CORYNE. 105 



This is not unfrequently found cast ashore on the Ayrshire 

 coast, and I have dredged it in Arran. It was first known 

 to me under the name of Alcyonium echinatum. The shells 

 on which it is generally found by us are, Buccinum undatum, 

 Fusus corneus, Natica glaudna, and Nassa reticulata. It 

 has been stated by several naturalists, that the shells it 

 infests are inhabited by hermit crabs, and some of them 

 have observed, as we also have done, that the rim of the 

 aperture of the shell is extended by the growth of the 

 zoophyte in the form of a horny membrane, by which the 

 dimensions of the crab's domicile is greatly enlarged, having 

 thus a kind of verandah, without an intervening wall. 



Genus III. COBYNE, Gartner. 



Gen. CJiar. Polypes sheathed in a thin horny membrane or 

 tube, branched and subphytoidal, the apices of the branches 

 polypous, clubbed, and furnished with short tentacula with 

 globular tips, and arranged without order ; mouth terminal ; 

 ovules separate, very shortly pedicled. Johnston. This name 

 is the same in meaning as that of Genus I., clava being the 

 Latin, and coryne the Greek, for a club. 



1. CORYNE PUSILLA, Gcertner* (Plate I. fig. 2.) 



* Joseph Gartner, M.D., born in Wirtemberg, 1732. 



