some Mediterranean Bryozoa, 101 



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



The zoariiim grows as a hollow cylinder (2-3 inm. diara.), 

 or inegiilaily, in places t'ormiiig more than one laj-^er. 



The oral aperture is exceedingly long with a marked con- 

 traction about the middle, tlie lower edge being nearly straight 

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

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

 the zooecium there is a long narrow avicularium, directed 

 distally and exiending beyond the line of the aperture. 

 Although there are several specimens, no ovicells have been 

 found. The surface of the zooecium is irreguhnr, 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. 



Tliero are two distal rosette-|)lates near the basal wall. 



When only some of the tubular specimens had been seen 

 there was thought to be some similarity to Fedora excelsa, 

 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 JuUien'?; collection from Petit Taliou, Liberia, 

 there were a considerable number of specimens, together with 

 Cupularia canariensis and an erect Porella, and specimens 

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

 d'Histoire Naturelle, Paris. 



Loc. Oran, "zone coralligeue,^^ 54 fathoms ; Petit Tahou, 

 Liberia. 



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



Layenipora if/nota, Norman, " Polyzoa of Madeira," Journ. Linn. See, 

 Zool. vol. XXX. p. 309, pi. xlii. tigs. 10-13 (1909) ; Osbiun, " Bry. of 

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

 p. 214 (1914). 



The zooecia are small, and there are very narrow vicarious 

 avicularia placed upon a kind of mound. No zooecia 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. sucialis, IJincks, to which I 

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



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

 1913, p. 51] ; Proc. Zool. Soc. 1914, p. 856. 



