STOMATOPOBA. 51 



Stomatopora waltoni, pars, Vine, 1884, Polyz. Richmond boring: Quart. Journ. 



Oeol. Soc. vol. xl. p. 787, fig. 2b (non 2). [Brit. Mus. 



No. D. 901.] 

 ,, jurensis, Etallon, 1862, Etud. Haut-Jura Cor. pt. i. : Mem. Soc. 



Emul. Doubs. ser. 3, t. vi. p. 211. 

 phillipsi, Vine, 1893, Polyz. Thrapston: Proc. Tories. Geol. Soc. 



new ser. vol. xii. pt. iii. pp. 250-2, pi. xii. figs. 1-3. 

 ,, intermixta, Vine, 1893, ibid. p. 252, pi. xii. fig. 4. 



dickotoma, Vine, 1893, ibid. p. 252, Ppl. xii. fig. 5. 



,, waltoni, Vine, 1893, ibid. p. 253, Ppl. xii. fig. 5. 



DIAGNOSIS : 



Zoarium of uniserial zocecia branching dichotomously or irregu- 

 larly. Typically it is very loose. Long unbranched series occur. 

 Crowded varieties with tufted ends to the branches also occur. 



Zocecia at first regularly cylindrical, but soon becoming pyriform 

 or subpyriform ; obscurely transversely ridged ; surface punctulate. 



Peristomes slightly raised, usually not on the median line. 



Ocecia unknown. 



Formula. p, c, I, r = 1, 2, 1, 0. 



Description of Figures. PI. I. Fig. 3. Four zocecia from a 

 specimen encrusting Multiclausa, sp., X 20 dia. Great Oolite : 

 Hamcastle, near Bath. B. 4249. PI. I. Fig. 4. Zocecia of a young 

 specimen (the var. attenuate of Walford), X 20 dia. Cornbrash: 

 Thrapston, Northamptonshire. D. 927. (Vine Coll.) 



DISTRIBUTION. 



BRITISH : 



Corallian Lower Calcareous Grit : Hinton-Trowbridge. 

 Cornbrash : Thrapston ; Bedford. 



Great Oolite: Richmond horing, 1205ft. ; Hamcastle, near Bath. 

 Fuller's Earth : Wiltshire. 



Inferior Oolite : Gloucestershire, Cleeve Hill ; Leckhampton ; Postlip (Cam- 

 bridge) ; Stroud (fide Witchell) ; Shipton Gorge, Dorset. 



FOREIGN : 



Corallian : Valfin, Haut-Jura. (Diceratian.) 

 Oxfordian : Boulogne. 



Callovian : Grain and Percey le Grand, Haut-Jura. 

 Bathonian : Ranville, Calvados ; Conflans and "Wode'court, Moselle. 

 Zone of Perisphinctes quercinus : Longwy ; Balin, Austria. 



