152 CAMPANULARIID^E. 



or very slightly sinuous, of a dark brown colourj thickly 

 branched; branches given off at short intervals in pairs, 

 which are placed alternately on opposite aspects of the 

 stem, so as to present a subverticillate arrangement, com- 

 pound for some distance above the point of origin, 

 the upper portion consisting of a single tube and very 

 hyaline, divided and subdivided into very numerous 

 alternate ramules, and annulated above the divisions ; 

 HYDiioTHEC^E very small, of the thinnest texture, cam- 

 panulate, supported on rather long ringed and tapering 

 pedicels, the margin cut into denticles of a castellated 

 form, slightly hollowed out at the top; GONOTHEC^E 

 axillary, ovate, somewhat flattened at the top, with a 

 raised aperture. 

 GONOZOOID with 16 arms at the time of liberation. 



PALLAS'S description of this species is admirable, and it is 

 the only one we possess that is not positively incorrect. 

 Fleming took the rim of the calycles to be 

 plain, and conjectures that Pallas may have Fig. 17. 

 seen the tips of the tentacles showing above 

 the edge and mistaken them for crcnations ! 

 Johnston adopted Fleming's opinion on this 

 point, and has besides confounded the true 

 O. gelatinosa with a very different form, the 

 Campanularia flexuosa (Hincks) . Many sub- 

 sequent authors have accepted his view ; and much con- 

 fusion lias been the result. Milne-Edwards, supposing 

 Fleming's even-rimmed Campanularia to be distinct from 

 Pallas's Sertularia gelatinosa, has made it a species and 

 given it the name of Laomedea Flemingii; but there is 

 no doubt that Fleming had the same form before him 

 as the Russian naturalist*, the crenature having escaped 

 his notice owing to the extreme tenuity of the margin. 



; ' I have been informed by the late Mr. Alder that he had examined speci- 



