Vol. 67.] THE CARBONIFEROUS SUCCESSION IN GOWER. 553 



VIII. Pal^ontological Notes [A. V.]. 

 (A) CORALS. 

 TABULATA. 

 Syringopora. 



Syringopora cf. geniculata Phill., Nicholson, from C 2 (main part). 



This is the dominant Syringopora of C a , Gower, and it there 

 takes the place of Syringopora cf. reticulata, which is the commonest 

 form in C -S of the Bristol area. 



Description. — Broad and ramulose, with strongly thickened 

 tubes and not numerous connectors. Very numerous, thick, septal 

 spines project from the wall, and almost or quite penetrate the very 

 thick lining of stereoplasm. (The abundance and strength of the 

 septal spines causes a misleading resemblance, in cross sections, to 

 Lithostrotion junceum .) 



Tabulae deeply dependent and distant. 



Comparison. — S. geniculata Phill., Nicholson, 'Tabulate 

 Corals ' 1879, pi. x, figs. 4, 4 «, & 4 6, agrees closely with our 

 species, from which it differs only in degree, namely, it has 

 shorter septal spines, less widely-spaced tabulae, and is far les 

 ramulose. 



Nicholson's conception of S. geniculata Phill. differs from the 

 type-figure x in the scarcity of connectors, but agrees with Phillips's 

 definition of the species in respect to the ramulose habit ('radiating, 

 often flexuous, branching, round tubes' — Phill. op. cit. p. 201). 



On the other hand, the accepted connotation of the specific name 

 geniculata (compare Ed. & H. ' Monogr. Brit. Foss. Cor.' Pal. Soc. 

 1852, pi. xlvi, figs. 2 ife 2 «) disagrees with Phillips's figure in the 

 absence of radiation and branching. 



The type of Phillips's species being lost, there seems little hope 

 of obtaining a clear conception of S. geniculata from his definition 

 and figure. 



ZAPHRENTIDS. 

 Zaphrentis. 



Zaphrentis oystermouthensis, sp. nov. (PL XL, figs. 1 a-1 e.) 



Compare Zaphrentis aff. enniskilleni Ed. & H., Vaughan in ' Kusk Paper,' 

 pi. xxix, fig. 2. See also ' Louglishinny Paper' p. 457. 



Description. — Form conical and as a rule continuously cornute, 

 4 to 5 cm. in length. (Fig. 1 a illustrates the less common form, 

 which is only bent at the tip.) 



External surface practically smooth, except for fine annular striae 

 and flattened rugae. 



In the calyx : — Fossula on the concave side, very deep, and 

 occupying more than half the diameter of the coral. 



1 'Geol. Yorkshire' pt, ii (1836) pi. ii, fig. 1. 



