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 glaucina, and Nassa reticulata. \t 
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. CORYNE, Gertner. 
Gen. Char. 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 clud. 
1. Coryne pusiLLa, Geriner® (Plate I. fig. 2.) 
* Joseph Gertner, M.D., born in Wirtemberg, 1732. 
