MEMBRANIPORID^E. 53 



Cells ovato-elongate or pyriform. separated by distinct septa ; surface smooth, with 

 a single row of minute punctures round the border; orifice arched above, contracted, with 

 a straight border below ; a wide, rounded denticle within the lower lip. 



Habitat. C. Crag, S. W., on shells. 



25. L. MALUSII, Audouin. PI. VIII, fig. 3. 



Cellulis ovatis seu hexagonis ; poris numerosis, stelliformibtis, irregulariter sparsis 

 ornatis, poroque centrali lunato signatis. Orificio supra arcuato, labio inferiori recto 

 peristomate simplici. Ovicellula elevatu, antice glabra, basim circa canaliculata seu 

 perforata. 



Cells ovate or hexagonal ; surface perforated with numerous stellate pores ; a central 

 lunate pore. Orifice rounded above, straight below ; peristome not thickened ; ovicell 

 prominent in front, smooth, grooved or perforated round the base. 



ESCHARA MALUSII, Andouin, Expl. i, p. 239 ; Savign., Egypt, pi. viii, fig. 8. 

 LEPRALIA MALUSII, Busk, Brit. Mus. Cat., p. 8.1, pi. ciii, figs. 1 4. 

 LEPRALIA BIFORIS, Johnston, Brit. Zooph., 2d ed., p. 314, pi. Iv, fig. 4. 

 HERENTIA BIFORIS, Gray. 

 CELLEPORA MACRY, W. Thompson (not Delia Chiajel nor M. Edwards). 



Habitat. C. Crag, on Terebrat. grandis, J. S. E. (Recent) Britain, common ; South 

 Patagonia (48 fins.) ; Falkland Islands, Darwin ; New Zealand, Dr. Lyatt ; on shells, 

 stone and fuci. 



The peculiar stelliform appearance of the pores in the recent L. Malusii is perhaps 

 necessarily wanting in the fossil, in which the appearance of puncta is altogether very 

 indistinct. But the general aspect of the cells, the form of the mouth, and the existence 

 of the central lunate pore, as well as the very peculiar perforations round the attached base 

 of the ovicell, which are very apparent in the fossil, though accidentally not shown in 

 the figure, appear to be amply sufficient to prove its identity with the recent, cosmopolitan 

 species. 



26. L. REUSSIANA (n. sp.) PI. VIII, fig. 2. 



Cellulis ovatis, supra contractis, snperficie glabra; marginem circa serie punctorum 

 minimorum unica ornatis. Orificio siibquadrangulari seu oblongo, transverse ; peristomate 

 producto, integro, incrassato, denticuluin latum internum infra ostendente. 



