some Mediterranean Bryozoa, 101 



Lepralia oranensis, sp. n. (PL XII. figs. 11-13.) 



The zoarium grows as a hollow cylinder (2-3 mm. diam.), 

 or irregularly, in places forming more than one layer. 



The oral aperture is exceedingly long with a marked con- 

 traction about the middle, the lower edge being nearly straight 

 or slightly curved upwards, and the distal half ot the oper- 

 culum is very thick, almost semiglobular. On each side of 

 the zooecium there is a long narrow avicularium, directed 

 distally and extending beyond tiie line of the aperture. 

 Although there are several specimens, no ovicells have been 

 found. The surface of the zooecium is irregular, but cannot 

 be called granular, and in the Oran specimens pores are 

 seldom visible, whereas in the Liberia specimens they are 

 more easily followed, there being three or four on the front 

 and some by the avicularium. 



There are two distal rosette-plates near the basal wall. 



When only some of the tubular specimens had been seen 

 there was thought to be some similarity to Fedora excel&a, 

 Jull., but this idea was abandoned on finding more material. 

 There is of ten a groove-like mark on the dorsal surface. 



In a box in Jullien's collection from Petit Tahou, Liberia, 

 there were a considerable number of specimens, together with 

 Cupularia canariensis and an erect Porella, and specimens 

 therefrom of L. oranensis were given to me in the Musde 

 d'Histoire Naturelle, Paris. 



Loc. Oran, "zone coralligene," 54 fathoms ; Petit Tahou, 

 Liberia. 



Lagenipora iynota, Norman. (PI. XII. figs. 15-17.) 



Layenipora ignota, Norman, " Polyzoa of Madeira," Jouni. Linn. Soc, 

 Zool. vol. xxx. p. 309, pi. xlii. hgs. 10-13 (1909) ; Osburn, " Bry. of 

 the Tortugas Islands," Pub. Carnegie lust, of Washington, No. 182, 

 p. 214 (1914). 



The zocecia are small, and there are very narrow vicarious 

 avicularia placed upon a kind of mound. No zocecia have 

 been found with two peristomial avicularia, whereas the 

 central peristomial avicularium is well-marked, having a 

 chamber much the same shape as that figured by Savigny 

 for his Cellepora lancreti, in which the ovicells are different. 



The ovicells have a row of pores within the ridge, as is 

 usual in Lagenipora, whereas L. socialis, llincks, to which I 

 have frequently referred*, has a pore at each corner, and as 



* Journ. Linn. Soc, Zool. vol. xxx. p. 174 (1907) ; Proc. Zool. Soc. 

 1913, p. 511 ; Proc. Zool. Soc. 1914, p. 856. 



