96 POLTZOA. 



41. M. lineattl, Linnaeus ; Busk, I.e., p. 58 ; Johnston, I.e., p. 349. 

 Cells oval, separate, the margin armed with numerous slender spines, 

 erect or bent inward. 



Europe. Greenland. 



42. M. tOSSellata, sp. nov. Cells oval, arrangement quincunc, 

 front rounded above with the sides and bottom flat, margin rough with 

 short projecting denticulations ; interspaces granular ; ovicells rather 

 flat, granular. 



Common ; incrusting dead shells, &c. 



43. M. brunnea, sp. nov. Cells broadly oval, with a single 

 spine at the centre of each side projecting over the front ; ovicells 

 flattened with a median ridge ; a cup-shaped avicularium on each side 

 just below it. Brown. 



On Turritella rosea. 



44. M. Cyclops, Busk, I.e., p. 61. Front of cells oval ; margin 

 very much raised, beaded ; a single avicularium below the aperture. 



45. M. magnilabris, Busk, I.e., p. 62. Front of cell oval; 

 upper margin semicircular, much raised ; moveable lip very large, 

 occupying the entire semicircular upper third of the front of the cell, 

 remainder of the front of cell depressed, membranous or semi-calcareous, 

 punctured. 



South Africa. Atlantic. 



LEPRALIA. 



Polyzoarium adnate, crustaceous, spreading from a centre in a more 

 or less circular form ; composed of contiguous or connected, calcareous, 

 decumbent cells, the walls of which are complete in front. 



Widely distributed. 



1. With Avicularia. 



46. L. reticulata, Macgillivray ; Busk, I.e., p. 66; Johnston, I.e., 

 p. 317. Cells ovato-ventricose ; interspaces punctured ; mouth raised, 

 with a thin margin and a channelled sinus in the lower lip, two to 

 three spines on the upper margin ; a central avicularium immediately 

 below the mouth ; mandible acute ; ovicell globular, punctured, its 

 opening bounded below by the meeting of its sides above the avicu- 

 larium. 



Britain. 



47. L. angela, sp. nov. Cells ovate, immersed, with radiating 

 grooves ; mouth sub-orbicular, the lower lip prolonged into a deep 

 spout-like projecting sinus ; a spoon-shaped avicularium on each side 

 just below the mouth, directed horizontally outwards; ovicell large, 

 globose, granular. 



2. With Vibracula. 



48. L. ciliata, Linnaeus ; Busk, I.e., p. 75 ; Johnston, I.e., p. 279. 

 Cells ovate or sub-globose, surface granular, an elongated acuminate 

 vibraculum on one side of the body ; a semilunar pore, frequently on 

 an eminence, in the middle of the front of the cell above the centre ; 



