CELLULARIA. 33 



Genus CELLULARIA, Pallas. 



Der. From eellula, a diminutive of cilia, a cell. 



CELLULARIA, Pallas, Blench.: Busk: Smitt, part. 

 (part.), Gray. 



GENERIC CHARACTER. ZOARIUM jointed. ZOCECIA in 

 two or three series, many in each internode, contiguous; 

 dorsal surface perforated. AVICULARIA and VIBRACULA 

 usually wanting ; occasionally an avicularium on a few of 

 the cells in an internode. 



THERE would seem to be no special reason for the appro- 

 priation of Pallas's name to this particular type; amongst 

 the miscellaneous assemblage of forms which be has 

 ranged under it, there is probably not one referable to 

 Cellularia as here defined. But it is clearly most desi- 

 rable to avoid any change of established nomenclature 

 which is not imperatively called for; and as all the 

 members of Pallas's genus seem to have a home else- 

 where, there can be no objection to the new application 

 of his classical name which we owe to Mr. Busk. 



The only British member of this group is totally des- 

 titute of appendicular organs, and is remarkable for 

 the neatness and simplicity of its structure. The allied 

 Australian species, C. cuspidata, closely resembles it in 

 general character; but in C. ornata, Busk, we meet with 

 avicularia, which, however, are most sparingly developed 

 and of a peculiar type. So far as my observation goes, 

 they occur only on three of the uppermost cells in each 

 internode. They occupy a small triangular area, and are 

 furnished with a semielliptical mandible. 



I am inclined to think that we must regard both Cellu- 

 laria and Menipea as descended from forms furnished 



D 



