390 Mr. W. D. Lang—Revision of the 
XV. Mo orora, gen. nov. 
Genotype. A. distincta. 
Tabular Diagnoses of the Species. 
A. ‘Tubercles on median line of fusion 14-16, those 
on the apertural bar being well developed. 
Apertural bar less flattened in a vertical plane. 1. 4. distincta. 
B. Tubercles on median line of fusion 12-14, those 
on the apertural bar being absent or poorly 
developed. Apertural bar more flattened in a 
Vertical plane" .2:; 5.1. cies astauetecg, tee Si aepemadok 2. A. stellata. 
l. A. distincta, sp. n. 
Type-specimen. British Museum, D. 28062; coranguinum- 
zone; Upper Basildon, Berks. 
2. A. stellata, sp. n. 
Type-specimen. British Museum, D. 28911; quadratus- 
zone, pillula-subzone ; North Lancing, Sussex. é 
XVI. AucHENopoRA, gen. nov. 
Genotype. A. guttur, sp. n. Type-specimen. British 
Museum, D. 28219; Danian; Faxe, Denmark. 
XVII. PancHEILoPora, gen. nov. 
Genotype. P. magnilabrosa, sp.u. Type-specimen. British 
Museum, D. 28911; quadratus-zone, depressa-subzone ; 
Ki. of Brighton, Sussex. 
XVIII, Lexyrnociena, Marsson, 1887, Pal. Abh. vol. iv. 
part 1, p. 90. 
Genosyntypes. L. ampullacea, Marsson, 1887, op. cit. 
p. 91, plex. ig. 
L. effigurata, Marsson, 1887, op. cit. p. 91, 
pl. ix. fig. 8. 
Genolectotype. L. ampullacea, Marsson, 1887, loc. cit. ; 
mucronatus-zone ; Rigen, Germany. 
XIX. Hotostecopora, gen. nov. 
Genotype. H. epsomensis, sp.n. Type-specimen. British 
Museum, D. 23959; top of coranguinum-zone; Epsom, 
Surrey. 
