48 PROCEEDINGS COTTESWOLD CLUB 1912 



In outline this form corresponds with the middle-age 

 of a specimen figured by Szajnocha from Balin, under the 

 name of " Terebratula [Eudesia] neidzwiedzkii " (Brach. fauna 

 der oolithe von Balin bei Krakau, pi. V., fig. 12). 



Since, however, Szajnocha's species assumes an elongate 

 form after middle-age and all the specimens obtained as yet 

 from Doulting are of the " middle-age " outline, we have 

 deemed it desirable to give the Doulting form a distinctive 

 name. 



The outline of the present form separates it from the 

 specimen of " Terebratula [Eudesia] cardium, Lamarck " 

 as figured by Davidson (Monograph, pi. XII., figs. 13 and 

 13a). 



ORNITHELLA CLEEVENSIS,^ .sp. nov. PL VH., figs. 4a 

 and b. 



T.l. " Sand-hole," near " Roadstone Hole," Cleeve Hill. 



Hor. Lower Trigonia-Gvit. >)'. Discitce. 



Colin. L. Richardson. 



Description. — Shell elliptical in outline with a suggestion of subpentan- 

 gularity and a tendency to become distinctly subpentangular in old age owing 

 to the straightening of the anterior margin. Valves regularly convex. Beak 

 prominent, but somewhat close to the umbo ; foramen small ; deltidial 

 plates scarcely visible. 



Remarks. — There is no other species of Ornithella in 

 the Lower T rigonia-Gxii of the Cotteswold Hills at all like 

 the present species. The shell which it most closely resembles 

 is Ornithella hughesi (Walker) from the Upper Trigonia- 

 Grit. From it, however, the present species is distinguished 

 by its usually more robust appearance, due to the greater 

 convexity of the valves (particularly the brachial), and its 

 tendency to assume a subpentangular outline. 



Up to the present Ornithella cleevensis has been recorded 

 only from the " Sand-hole " near the " Roadstone Hole " 

 on Cleeve Hill, where it is abundant in the bottom portion 

 of the Lower Trigonia-Gvit along with specimens of corals 

 {Chorisastrcea, etc.). 



X. From Cleeve Hill, near Cheltenham. 



