528 Rev. T. Hincks on British Poh/zoa. 



9. Cylindropokella, nov, gen. 

 {Lepralia, part, Norman &c.) 



Zoarium adnate, incrusting ; zoooecia having the front wall 

 composed of a single piece, not depressed ; oral extremity 

 produced, tubular, with a terminal orifice ; an elevated pore 

 on the front of the cell. 



Type Lepralia tabidosa^ IS^onnan. 



10. LAGENiroRA, nov. gen. 

 (See ' Annals ' for September 1877, p. 214.) 



Type L. socialis, Hincks. 



11. ScHizOTHECA, nov. gen. 



Zoarium incrusting; zoooecia with a suborhicular (primary) 

 aperture, the lower margin slightly sinuated ; secondary aper- 

 ture raised, tubular, notched or dentate in front ; oooicium 

 terminal, with a fissure in the front surface ; avicularin borne 

 on distinct areas and distributed amongst the cells, sometimes 

 wanting. 



Type Lepraiia fissa^ Busk. 



12. Ehynchopora, nov. gen. 

 (Lepralia, part, Johnston.) 



Zoarium incrusting ; zoomcia with a suborbicular or sub- 

 quadrangular aperture, the lower margin supporting an unci- 

 nate process ; a large aviculariura (in fully developed speci- 

 mens) placed transversely below the aperture ; oooecium ter- 

 minal, closed in front by a calcareous lamina. 



Type Lepralia hispinosa, Johnston. 



13. Anarthropora, Smitt (part). 

 {Lepralia, part, Busk.) 



Zoarium incrusting ; zoooecia free and suberect above, 

 aperture transversely elongate, contracted, with an entire and 

 thickened peristome ; an avicularium below and above the 

 aperture. 



Type Lepralia monodon^ Busk. 



The diagnosis is founded on the adult state. T^\\e priviary 

 aperture is slightly arched above, with a straight inferior 

 margin, and is little if at all elevated. 



I quite agree with Mr. Norman* that Smitt has united 

 distinct types in his genus Anarthropora ; and in conformity 



* Rep. Crit. Assoc. 18G8, fig. 309. 



