36 On the Cretaceous Species of Podoseris, Dunc. 
The genus Podoseris evidently requires some further amend- 
ment. 
Genus Poposrris, Dunc. Supp. Brit. Foss. Corals, Pal. Soc. 
1869, Cretaceous Corals, pt. ii. no. 1, p. 25, and Oolitic 
Corals, pt. iii. p. 24; Revision 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; coste as continuations of septa, 
in the direct line, usually the most numerous. Synapticule 
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 Podoserts constricta, Dunc., Pal. Soe. 
Supp. Brit. Foss. Corals, Oolitic Corals, pt. iii. p. 24, pl. il. 
figs. 5, 6, came from the Lower Ragstone of Dorset. It hasa 
higher septal number and much more delicate and nearly 
uniform costo-septe 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. noy. Side view, nat. size. 
Fig. 2. The same. The calicular fossula, magn. 
Fig. 3. Podoseris anomala, sp. noy. Side view, nat. size. 
Fig. 4. The same. Part of the calice, magn. 
Fig. 5. Podoseris Jessoni, sp. nov. Side view, nat. size. 
Fig. 6. The same. The fossula and some septa, magn. 
Fig. 7. Podoseris brevis, sp. nov. Side view, nat. size. 
Fig. 8. The same. Test of the coste, magn. 
Fig. 9. Podoseris mammiliformis, Dunc. Part of calice, magn. 
Fig. 10. Young Podoseris, slightly magn. 
Fig. 11. Older Podoseris, slightly magn. 
Fug. 12. Podoseris dubia, sp. noy. Side view, nat. size. 
Fig. 13. The same. Part of calice, magn. 
tg. 14. Podoseris elongata, Dunc. Part of a transverse section below 
the calice, magn. a, synapticulz ; 8, dissepiments. 
Fig. 15, The same. Part ofa longitudinal section, magn. a, synapticule ; 
8, dissepiments. 
Fig. 16. The same. A longitudinal slice, polished. a, synapticule, long 
and oblique ; 8, dissepiments. - 
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