Cyclostomatous Bryozoa from Madeira. 63 



Between the radiating series of cells arc one or two rows of 

 pores. 



A few examples of this small species were found upon a 

 halichondrine sponge [Petrosia) which came from deep water 

 ofi' Madeira. The largest had a diameter of no more than 

 3 niillim. Its ])lacc seems to be near Lichenopora [Disco- 

 porella) fimbriata, Bk. (Ot. Cyclost. Pol. 13. M. p. 32, 

 pi. xxvii.). 



Badiopora irregularis^ J. Y. Johnson. 



White or brown, seated on a thin calcareous lamina. The 

 zoarium usually consists of a central portion, around which 

 extend subtriangular lobes, irregular as to their directions and 

 relative sizes, but frequently giving to the whole something 

 of the appearance of a starfish, such as Asterina, with short 

 broad rays. 



The central portion of the zoarium is raised and cupped, 

 and the circumambient ridge is crossed by radiating series of 

 upright connate cells. A depression runs along the middle of 

 each exterior lobe, but stops short of the margin of tlie 

 zoarium. Numerous series of cells are arranged at rig-ht 

 angles to the median depression, and at the distal end of the 

 lobe the series of cells radiate from the end of the furrow 

 towards the margin. 



The cells are upright, connate, and invariably form a single 

 series. They are highest near the central cup and the depres- 

 sions of the lobes; they gradually fall in height until they 

 become immersed, and their mouths alone are shown at the 

 margin of tiie zoarium. The mouth of the upright cells is 

 prolonged into a mucro on the distal side, and sometimes on 

 the opposite side also when the upper part of the cell is 

 distinct. Round or oval pores varying in size occupy the 

 central area and the lateral furrows. Between the series of 

 cells there are two or three rows of pores. 



There is much irregularity both as regards the outline and 

 the superficies of this species : for instance, there are some- 

 times more intramarginal cups than one ; at others there is 

 no central cup at all ; in some cases the central cup contains 

 a short detached series of erect cells ; a series of cells occa- 

 sionally throws off a branch series or more than one. 



The largest specimen I have seen has a diameter of 

 10 millim. This species has been found on seaweed and on 

 Pinna shells, but the best examples were attached to the 

 outside of a wine-bottle dredged in Funchal Bay. 



From the above description it seems that Mr. Busk's 

 definition of the genus (Cat. Cyclost. Polyzoa Brit. Mus. 



