98 Mr. A. W. Waters on 



not come before me, nor had the specimens first met with any 

 ovicells, but they occur from Oran and from Capri. Neviani 

 evidently had very small pieces fossil, and did not describe 

 any ovicell. He speaks of it as incrusting, though with frag- 

 ments it might be difficult to be certain of this; from Naples 

 and Capri it is unjlaminate, whereas from Oran all except 

 one piece are bilaminate, back to back. Jullien and Calvet, 

 in describing L. grimaldi, do not say whether it is uni- or 

 bilaminate. 



Neviani described the surface as rugose, Jullien and Calvet 

 say with small perforations, and both are correct as regards 

 Capri and Oran specimens, which are covered by large 

 granules and in between there are small pores. The nature 

 of the granules varies in different parts and in some con- 

 ditions they are the most noticeable, while in others the pores 

 are the most distinct, but none could be described as smooth. 

 The piece figured is very regular, but this is not always the 

 case. 



There is a small triangular avicularium at one or both of 

 the upper corners of the zocecium. 



There are about 27 tentacles in the Naples specimens. 

 There are usually 4 distal multiporous rosette-plates near 

 to the basal wall and 4-6 lateral ones. 



The ovicell is coarsely granular, but the granules are not 

 so large as those figured by Jullien and Calvet. It is 

 not raised, but shows beyond the oral aperture buried in the 

 distal zocecium. The ovicelligerous zocecia have a much 

 wider oral aperture than the ordinary zocecia, with the 

 proximal edge straight, while the distal border forms 

 the curve of a wide arc (see fig. 8). The ovicell has much 

 the same shape as that of i lustra foliacea, L., passing to the 

 basal wall, the wall between the distal end of the zocecium 

 and the ovicell does not appear to be calcareous. 



It is very difficult to know in which genus this should be 

 placed. Neviani * made the genus Hippoporina for all species 

 indicated by modern authors as Lepralia — that is to say, all 

 that have a horseshoe-shaped oral aperture ; he then men- 

 tions H. 2?ertusa, Esper, which should therefore be the type 

 of Hippoporina. In Part II. of the same paper, also 1895, 

 he mentions H. foliacea, Ell. & Sol., and then H. Integra, 

 sp. n., which he figures. Canu calls this the type, but it is 

 not the first mentioned. In Part III., 1896, Neviani men- 

 tions H. imbellis, Busk, and H. adpressa, Busk; then, further 



* "Bri. neoz. di alcune Loealita d'ltalia," 1895, p. 109, and Waters, 

 " Bry. from Zanzibar/' Proc. Zool, Soc. 1913, p. 515. 



