26 MARINE POLYZOA. 



4. CANDA. 



Cells rhomboidal, sinuated on the outer side for the lodgment 

 of a vibraculum. No avicularium on the upper and outer angle. 



Canda, Lamx. 1816, Pol. flex.; Blainv. 1830; Gray, List Brit. 



Rad. E. M. 



Cellaria, sp. Lamk. 1816. 



Cellarina, Van Eened. Bull. Acad. Brux. 1849, 645. 

 Bicellaria, sp. Blainv. 1830. 

 Scrupocellaria, Gray, List Brit. Rad. B. M. 112. 



This genus is at once distinguished from Scrupocellaria, to 

 which it is otherwise closely allied, by the absence of the sessile 

 avicularium on the upper and outer angle in front, and also by 

 the circumstance, that although there are flexible anterior avi- 

 cularia, they do not correspond in number with the cells, but 

 seem to be disposed in a special tract along the middle of the 

 branch or internode. The connexion of the branches by trans- 

 verse tubular fibres is not a character of either generic or specific 

 importance, though it is more striking in the only species hitherto 

 known as belonging to this genus than in any other. These 

 transverse tubular fibres are, like the radical fibres in Scrupo- 

 cellaria, always inserted, not into the body of a cell, but into a 

 vibraculum. They are evidently of the nature of a byssus. 



1. CANDA ARACHNOIDES. PL XXXIII. 



Cells biserial ; aperture oval, truncated above, and the upper 

 margin recedent, with a spine on each side, the outer the longer. 

 Surface of cell covered with transparent granulations. An irregular 

 number of sessile avicularia along the median line of each branch. 

 Branches connected by numerous tubular fibres. 



Canda arachnoides, Lamx. Exp. Meth. 5. pi. 64. figs. 19-22; 



Blainv. Man. d'Act. 457. pi. 79. fig. 2 (not Gray, Brit. Rad. 



113); Busk, Voy. of Rattksn. i. 3?1. 

 Cellaria filifera, Lamk. An. s. V. 2nd ed. ii. 177- 

 ? Acamarchis Jolloisii, Savig. pi. 11. fig, 2. 

 Hob. Bass' Strait, 45 fathoms. 



2. CANDA REPTANS. PL XXL figs. 3, 4. 



Cells constricted below. Aperture oval, with three or four 

 marginal spines and a pedunculate operculum with a lobate 

 lamina. 



Creeping Coralline, Ellis, CoralL 37. pi. 20. no. 3. fig. b, B. 

 Sertularia reptans, Linn. Syst. 1315; Fabr. Faun. Groenl 445. 

 Sertularia repens, Berk. Syn. i. 220. 

 Cellularia reptans, Pall. Elench. 73 ; Flem. Brit. Amm. ; Johnst. 



