836 ESCHARID^. 



there is a slight projection on each side, so that it is, as 

 Sars has remarked, somewhat lyre-shaped. The ovicells 

 are large and very prominent, closely united to the wall 

 of the cell above, and in front to the peristome, which 

 forms a thin raised border round the orifice. 



On the British coasts C. lavis has only occurred in 

 Shetland, and ranges thence to the Arctic seas. 



It was first noticed and briefly characterized by Flem- 

 ing (1828), and was then almost lost sight of until it was 

 redescribcd by Sars (1862) and subsequently by Alder. 



Genus ESCHAROIDES *, Smitt. 



Der. Formed from Eschara, a genus of Polyzoa. 

 EsciiARA (part.), auctt. 



Generic Character. — Zocecia toith the primary orifice 

 suhorhicular ; peristome much elevated and forming a 

 secondary orifice, arched above and ivith a sinus below, 

 ivithin which an avicularium is inclosed. Zoarium {in 

 British species) erect, ramose. 



EsCHAROIDES ROSACEA, Busk. 



Plate XLVII. figs. 5-9. 



Eschara rosacea, Busk, Ann. N. H. ser. 2, xviii. 33, pi. i. fig. 4 : Norman, 

 Quart. Journ. Micr. Sc. (n. s.) viii. 9, pi. vi. figs. 10-12. 



EscHAROiDEs ROSACEA, S?nitf, CEfv. K. Vet.-Ak. Forh. 1867, Bihang, 25 and 

 161, pi. xxvi. figs. 155-159. 



Zoarium composed of a short stem and a number of com- 

 pressed foliaceous branches, divided into shallow dilated 



* The name originated with Milne-Edwards. 



