RADIOPOEA. 
28.5 
Foreign : 
Neocomian: Geovressiat, near Nantua, Ain; Vassy, Fontenoy, and Chena}v 
Yonne ; Eaudrecourt, Haute-Mame ; Sainte-Croix, Vaud ; 
Mont Saleve, Switzerland. 
Figures. 
Fig. 74. Part of a vertical section; X 8 dia. Lower 
Greensand : Farringdon, Berkshire. Old Coll. D. 3143. 
Fig. 75. Part of a horizontal section cut from the same 
zoarium ; X 10 dia. Old Coll. B. 3143. 
Affinities. 
The difficulty with this species is its relation to the species 
founded by Kdmer as Alveolites heteropora, and here regarded as 
a Reptomulticava. D’Orhigny in 1854 regarded that species as 
synonymous with his Monticulipora neocomunsis^ and figured an 
excellent specimen, which he identified as Radiopora heteropora. 
The specific name neocomiensis has, however, four years priority, 
and though the original description was short — “ Espece tubereuse, 
a, monticules tres-reguliers ” — it mentions the two most striking 
characters of the species. 
Fig. 74 . — Radiopora neocomiensis. Vertical Fig. — Radiopora neocomiensis. 
section; x 8. D. 3143. Horizontal section; x 10. 
D. 3143. 
The British Museum Collection includes a specimen which 
appears to me the same as Rdmer’s Alveolites heteropora^ and, as 
shown by Fig. 34, p. 133, the apertures in it are not radial and 
the zooecia are not dimorphic. It is a Reptomulticava, which differs 
from Radiopora, as the apertures are not radial and the zooecia 
monomorphic. 
The confused synonymy of this group of species is illustrated 
by a table on p. 129. 
