BRITISEI ZOOTHYTES. 83 



profusely branched, dark brown, branches white. 

 Calycles bell- shaped, very transparent and hyaline, 

 with castellated rims. 



This species is referred to by Mr. Gosse as the 

 " slimy Laomedea/^ 



The peculiar calycles are a characteristic of this 

 zoophyte, the margins being castellated with the sepa- 

 rate turrets somewhat hollowed. The calycles are 

 supported on short ringed tubes. The polypite is able 

 to contract almost entirely within the calycle, drawing 

 in its tentacles in a parallel bundle. 



3. 0. LONGissiMA, Pallas. 



Sertularia longissima (Pal.), Monopyxis longissima 

 (Ehr.), Laomedea dichotoma, var. /3 (6r. J.), Laomedea 

 longissima {Aid., McA., T. H.), Campanularia gelatinosa 

 {V.B.). 



Hab. : Northumberland {Aid.) ; Peterhead and Corn- 

 wall {0. W. P.); Filey, Devon {T. H.) ; Blackpool 

 {A. S. P.) ; St. Andrew's (ilfcl.). Height 12 in. Stem 

 long, dark coloured, branches fern-like, lighter coloured. 

 Calycles cup-shaped, with "blunt and shallow teeth'' 

 borne on ringed pedicels. The branchlets taper towards 

 the extremity of the stem, in which habit they are 

 imitated by the pinnse on the branchlets themselves. 

 This tapering form adds largely to the graceful and 

 fern-like appearance of the species. 



This species has often been confounded with the 

 succeeding one. 



4. O, DICHOTOMA, Linn. 



Campanularia dichotoma {Lh., Flem., Starh, Grant, 

 Temp., Lister), Sertularia volubilis {Fabr.), S. dicho- 

 toma {Linn., E. and S.), Laomedea dichotoma {Lamx., 

 Be B., G. J., R. Q. C, D. L., P. II. G , McA.). 



G 2 



