36 On the Cretaceous Sjjccies ^/ Podoserisj Dane. 



The genus Podoseris evidently requires some further amend- 

 ment. 



Genus Podoseris, Dune. Supp. Brit. Foss. Corals, Pal. Soc. 

 1869, Cretaceous Corals, pt. ii. no. 1, p. 25, and Oolitic 

 Corals, pt. iii. p. 24 ; llevision of Madreporaria, 1884, 

 Journ. Linn. Soc, Zool. vol. xviii. p. 153 (amended). 



The corallum has a narrow or wide base of permanent 

 attachment, the height varies from very low, plano-convex, to 

 high, stem more or less cylindrical. Calice more or less cir- 

 cular, with a small axial fossula or projecting there: a colu- 

 mella formed by the septal ends, with or without other struc- 

 ture, small ; septa numerous, uniting much, stout, or very 

 slender, solid, largely granular at the free convex edge, 

 minutely acicular at the sides ; costje as continuations of septa, 

 in the direct line, usually the most numerous. Synapticulaj 

 numerous, oblique, continuous with septal nodules, interseptal 

 loculi also with recurved hook-like processes : a delicate 

 arched dissepimental structure scanty. Epitheca exists on 

 the sides and at the periphery. 



Fossil : Red Chalk, Oolite, England. 



The Oolitic species Podoseris constricta^ Dune, Pal. Soc. 

 Supp. Brit. Foss. Corals, Oolitic Corals, pt. iii. p. 24, pi. iii. 

 figs. 5, 6, came from the Lower Ragstone of Dorset. It has a 

 higher septal number and much more delicate and nearly 

 uniform costo-septie than the Cretaceous species. It origi- 

 nally was fixed and probably upon a spine-shaped body. 



EXPLANATION OF PLATE V. 



Fig. 1. Podoseris affinis, sp. nov. Side view, nat. size. 



Fi(/. 2. The same. The calicuhxr fossula, uiagn. 



Fit/. 3. Podoseris anomcda, sp. nov. Side view, nat. size. 



Fig. 4. The same. Part of the calice, magn. 



Fig. 5. Podoseris Jessoni, sp. nov. Side view, nat. size. 



Fig. 0. The same. The fossula and some septa, magn. 



Fig. 7. Podoseris breris, sp. nov. Side view, nat. size. 



Fig. 8. The same. Test of the costse, magn. 



Fig. 9. Podoseris vwimnUiformis, Dune. Part of calice, magn. 



Fig. 10. Young Podoseris, slightly magn. 



Fig. IL Older Podoseris, slightly magn. 



Fig. 12. Podoseris dubia, sp. nov. Side view, nat. size. 



Fig. 13. The same. Part of calice, magn. 



Fig. 14. Podoseris elongata, Dune. Part of a transverse section below 



the calice, magn. a, synapticulse ; /3, dissepiments. 

 Fig. 15. The same. Partof a longitudinal section, magn. «, synapticute ; 



(3, dissepiments. 

 Fig. 16. The same. A longitudinal slice, polished, a, synapliculte, long 



and oblique ; ^, dissepiments. 



