36 CKLLULARIIDyE. 



divided into segments, which are united by corneous 

 joints. There are usually about 7-9 cells in each inter- 

 node ; but the number varies. Branches are given off 

 dichotomously ; and at each bifurcation an additional 

 cell is interposed, occupying the space between them at 

 their point of origin, which is surmounted by a short 

 acuminate spine. Mr. Busk makes the presence of this 

 cuspidate process a distinctive mark of the Australian 

 species C. cuspidata, but it belongs to C. Peachii as 

 well. 



Genus MENIPEA, Lamouroux. 



Der. From Menipea, one of the Nereids, according to Hesiod. 



CELLARIA (part.), Linnaeus. 



MENIPEA, Lamx. Bulletin Soc. Phil. 1812 ; Pol. Cor. flex. : Busk : Wyville 



Thomson, Dublin N.H. Rev. July 1858. 

 ORISIA (part.), Lamouroux. 

 TRICELLARIA, Fleming, Br. An. 

 CELLULARIA (part.), Johnst. Br. Zoopli : Smitt. 

 CELLARINA (part.), Van Beneden, Bull. Ac. Roy. Belg. 1849. 

 EMMA, Gray : Busk. 



GENERIC CHARACTER. ZOCECIA oblong, widest above, 

 attenuated and often elongated downwards ; imperforate 

 behind, with a sessile lateral avicularium (often wanting], 

 and usually one or two avicularia on the front of the cell. 

 No vibracula. ZOARIUM jointed. 



THE type of Lamouroux's genus Menipea is the M. cir- 

 rata*, a large species with six cells to the internode. 

 More commonly they are disposed in triplets ; and the 

 division of the zoarium into short segments, each carrying 

 a small cluster of cells, may be regarded as a charac- 

 teristic of the group, though there are certain exceptions. 



* The curled branches from which it takes its name are a striking feature 

 of the genus. 



