356 Prof. Allman on the Construction and 



periderm (?). Polypites fusiform, with two tentacula situated 

 at the base of a two-lipped metastome. 

 Gonosome not known. 



The remarkable and aberrant form described by Gosse under the 

 name of Lm' Sahellarum will need further investigation before it 

 will be possible to determine its true affinities. I have retained it 

 here, however, as a legitimate genus, and the type of a distinct family, 

 though, with our present knowledge of it, we are almost tempted to 

 regard it as an abnormal condition of some other form. 

 Lar sabellarum, Gosse. 



CorynidsB. 

 1. CoRYNE, Gartner. 



Trophosome. — Coenosarc consisting of a simple or branching 

 hydrocaulus rooted by a creeping filiform hydrorhiza, the whole 

 invested by a chitinous periderm. Polypites developed from the 

 summits of the hydrocaulus, clavate; tentacles capitate, scat- 

 tered on the body of the polypite. 



Gonosome. — Gonophores adelocodonic, developed from the 

 body of the polypite. 



Coryne pusilla, Gart., = Coryne pusilla, Johnst., nee Van 

 Beneden. 



Coryne ramosa, Sars. 



Coryne fruticosa, Hincks. 



Coryne vaginata, Hincks, = Coryne ramosa, Johnst., = Cory ?«e, 

 sp., Lister. 



Doubtful species. 



Coryne sessilis, Gosse. 



2. Syncoryne, Ehrenberg (in part). 



Tj'ophosome. — Coenosarc composed of a simple or branching 

 hydrocaulus rooted by a creeping filiform hydrorhiza, and the 

 whole invested by a chitinous periderm. Polypites claviform, 

 developed from the summits of the hydrocaulus; tentacles 

 capitate, scattered upon the body of the polypite. 



Gonosome. — Gonophores phanerocodonic, developed upon the 

 body of the polypite. Umbrella, at time of liberation, deep bell- 

 shaped ; manubrium moderately large, not reaching the mouth 

 of the bell*, destitute of oral tentacles ; radiating canals four ; 

 marginal tentacles four, with bulbous bases, generally furnished 

 with an ocellus. In some cases the gonophores, though phane- 



* It is to be kept in mind that the characters here given are those of 

 the Medusa at the time when it becomes free ; it is probable, however, 

 that it ultimately assumes the type of Sarsia, with its greatly developed 

 and extensile manubrium. See Agassiz on Coryne mirabilis, in the fourth 

 vol. of Cont. Nat. Hist. U. S. 



