BRITISH ZOOPHYTES, 287 



The zooecia are subcylindrical, with distinct granu- 

 lations all over the surface. The orifice has a peristome 

 extending into a mucro in front, and armed with 4 — 6 

 spines on the upper margin. On each side of the 

 orifice on the shoulder of the cell is a prominent avicu- 

 larium. The ovicels are globose and granulated like 

 the zooecia. 



8. M. PAVONELLA, Alder. 



Eschara pavonella {Alder, Bush, McA., Smitt.), E. 

 cribraria {Bush,B. Q. C), Discopora pavonella {Smitt). 



Hab. : Cullercoats {Alder), Scarborough {Bean), 

 Dogger Bank (T. E.). 



This species has two modes of growth. In one it 

 forms large rounded incrustations, in the other it 

 grows erect to the height of more than an inch. The 

 cells are large and oval, with a circular orifice, on the 

 lower margin of which is a blunt denticle. On each 

 side of the orifice is an avicularium. The surface of 

 the cell is smooth, with rib-like extensions from the 

 margin towards the centre, the ribs enclosing dark 

 markings near the margin. 



Genus VII. Palmiceliaria, Alder. {Palma, the palm 

 of the hand ; cella, a cell.) 



Zocecia with the primary orifice orbicular or ranging 

 from semicircular to semi-elliptical ; the peristome 

 elevated around it, so as to form a secondary orifice, 

 and carried out in front into a projecting palmate or 

 mucronate process, with an avicularium on its inner 

 aspect. Zoarium (in the British species) erect and 

 ramose, or (?) lamellate. — T. H. 



1. P. ELEGANS, Alder. 



