220 NATURAL HISTORY OF 



land {A. M. N.), Scarborough {Bean), Aberdeen 

 {Daivson). 



Zoaria forming slender tufts ; cells white, and ar- 

 ranged alternately in a double row. At the upper and 

 outer angle of each cell is generally present a minute 

 upright spine. Each cell slopes towards the outside, 

 and is surrounded by a thickened margin. There is 

 also a row of small openings at the back of the cell 

 towards the outer border. There are rarely any avicu- 

 laria or vibracula. 



Genus II. Menipia, Lamouroux. 

 After Menipea, one of the Nereids. 



Zocecium oblong, widest above, attenuated and often 

 elongated downwards, imperforate behind with a sessile 

 avicularium (often wanting), and usually one or two 

 avicularia on the front of the cell. No vibracula. 

 Zoarium jointed. — T. H. 



1. M. TERNATA, E. and 8. Plate XVII. fig. 4. 



Sertularia ternata [Tart.), Cellaria ternata {E. and S.), 

 Crisia ternata {Lamx., G. J.), Tricellaria ternata 

 {Flem., Gray, De B.), Cellularia ternata [Smitt, G. J., 

 D. L.), Cellarina gracilis {Van Ben.). 



Hab. : Sent from Aberdeen by Dr. D. Skene to 

 Ellis. Scarborough {Bean), Filey {T. H.), Northum- 

 berland (^ZcZ.), Peterhead (0. W.P.), Shetland (^.11. N.). 



Zoophyte bushy, white, three cells to an internode. 

 Zooecia elongated, with large lateral avicularia. 



This species sometimes grows to the height of about 

 an inch, but is usually smaller. It is found on Algae and 

 Hydroida, along the stems of which it climbs. The 

 first description of it is contained in EUis and Solander 

 (" Corallines,'^ 30). It is there described under the 



