174 ACTINOPOKA. 



Type species. Actinopora regularis, D'Orbigny, 1852. 



Affinities. This is the simplest type of the family Theonoidse. 

 It differs from Kololophos by having the zoarium simple and not 

 multiple. In its general form it resembles Zichenopora, from 

 which it differs by the absence of cancelli. 



1. Actinopora phillipsi (Haime). 



SYNONYMY : 

 Lichenopora phillipsi, Haime, 1854, Bry. jurass. : Mem. Soc. geol. France, ser. 2, 



t. v. p. 206, pi. x. fig. 10. 

 ,, Pictet, 1857, Traite Pal. ed. 2, t. iv. p. 151, pi. xci. 



fig. 30. 

 ? ,, Wright, 1860, Subdiv. Inf. Ool. : Quart. Journ. Geol. Soc. 



vol. xvi. p. 12. 



? ,, Witchell, 1882, Geol. Stroud, p. 48. 



,, Vine, 1883, 3rd Rep. Foss. Polyz. : Rep. Brit. Assoc. 



1882, p. 265. 

 ,, ,, Vine, 1884, Polyz. Richmond boring: Quart. Journ. Geol. 



Soc. vol. xl. p. 794. 

 ? ,, Vine, 1887, Jur. Polyz. Northptn. : Journ. Northptn. 



Nat. Hist. Field Club, vol. iv. p. 209. 

 ,, Woods, 1891, Cat. Type Foss. Woodw. Mus. p. 48. 



Diagnosis. Zoarium regular and circular. Radial ridges about 

 22 in number, straight, regular, unbranched ; the apertures are 

 biserial. New ridges arise from the interradial valleys. A broad 

 expansion surrounds the zoarium: this is low and flat, and is not 

 crossed by the radial ridges. 



DISTRIBUTION. 



Great Oolite : Hampton, near Bath. 

 ? ,, Richmond boring, 1205 ft. 



Affinities. This species is represented in the British Museum 

 only by a doubtful specimen from the Richmond boring. It is 

 also known to me by two specimens in the Cambridge Museum, 

 one of which was Haime' s type. 



The species differs from the type species of the genus by the 

 greater size of the central depression, and the smaller number of 

 radial ridges. 



D. 1894. ? Actinopora phillipsi. Great Oolite. Richmond boring, 1205ft. 

 Presented by Prof. J. W. Judd, C.B., F.R.S. 



