48 CELLULARIID.E. 



sionally two or three small depressions on the upper mar- 

 gin of the cell_, which, he thinks, may mark the positions 

 of as many spines. Whatever these depressions may be, 

 they seem to be rarely present ; and should they denote the 

 occasional development of spines in the living state, this 

 fact could not outweigh the evidence of identity supplied 

 by every leading feature, including the very distinctive 

 form of the vibracular cell. As Reuss's name was pub- 

 lished in 1847, it must, of course, supersede Norman's, 

 which only dates from 1866. To the latter we are indebted 

 for the addition of the species to the recent Fauna. 



b. With an operculum. 



ScRUPOcELLARiA scABRA, Van Bcnedcn. 



Plate YI. figs. 7-11. 



Sertularia halecina, Fabr. Faun. G-rcenl. 443 {teste Smitt). 



Flustra scruposa, Fabr. Nye Zool. Bidr. in Vid. Selsk. Phys. Skr. 1827-33 



{te.iite Smitt). 

 Cellarina .scrabra, Van Ben. Bull. Acad. Roj. d. Belg. xv. No. 2, 73, 



figs. 3-6. 

 Cellularia .scrupea, Alder, Trans. Tynes. Club, iii. 148 (North. Cat. 



sep. 58). 

 Scrupocellaria scrupea, Busk, Quart. Journ. Micr. So. iii. 254. 

 ScRUPOCELLARiA !> v.iji h\i, Busk, Quart. Journ. Micr. Sc. vii. 65, pi. xxii. figs. 



1-3: Alder, Quart. Journ. Micr. Sc. (n. s.) iv. pi. iii. figs. 4-8; 



North. & Durham Nat.-Hist. Trans, i. 163, pi. viii. figs. 4-8. 

 Cellularia scabra ,Smitt, Kritisk Forteckn., Oilfyers. af K. Vet.-Akad. For- 



handl. 1867, 283 & 314, pi. xvii. figs, 27-34. 

 Scrupocellaria scabra, Norman, Quart. Journ. Micr. Sc. (n. s.) viii. 214. 



Zoarium slender, dichotomously branched, internodes 

 moderately long (about 5-1.2 cells in each). Zooecia 

 short, erect, narrowed below ; aperture oval, with a 

 smooth border, occupying more than half the front, 

 with one stout spine (or frequently two) on the outer 

 margin above, and a smaller one on the inner. Oper- 



