R. F. Tomes — Some Cretaceous Madreporaria. 541 



As common Scar-limestone forms the following may be taken : — 

 Leperditia Oheni, Kirkhya Permiana, Cytlierella valida, JBairdia 

 Hisingeri, and B. siibmucronata. As distinguishing species, on account 

 of their exceptional occurrence in this formation, may be also named 

 Leperditia Armstrongiana, L. obesa, Beyricliia craterigera, Kirlcbya 

 costata, K. spiralis, K. tricoUina, Bythocypris bilobata, Argilloecia 

 cequalis, Bairdia curta, as well as others, most of which are either 

 confined to or attain their maximum development in the Lower 

 Carboniferous series of Scotland and the North of England. 



The Ostracoda of the Scar-limestone are generally more plentiful 

 and robust than those in tlie " Yoredales " above. Bairdia Hisingeri 

 pai'ticularly is large and thick-shelled as well as common. Cytherella 

 valida is perhaps the most abundant of any form in the shale and 

 shaly partings of the lowest beds. In the limestone itself, Leperditia 

 Armstrongiana, Bythocypris bilobata, Bairdia curta, and Xestoleberis ? 

 subcorbidoides come to the front as relatively common forms. 



In the Yoredale beds 22 species occur, most of which are of poor 

 growth and scarce, as before said. Beyricliia ventricornis, Kirkbya 

 tlrei, Cythere ? cuneola, Bairdia plebeia, and B. brevis may be named 

 as the prevailing forms. The two first named, along with K. spinosa, 

 Cytherella recta, C. Benniei, C. ? cornigera, and Phreatura concinna, are 

 apparently confined to this formation. All of these, except the 

 last (which is new), are well-known forms in the Carboniferous 

 Limestone series of Scotland, which formation is equivalent in part 

 to the Yoredale beds. 



In conclusion, we may add that there is little doubt but that more 

 remains to be done in this district, and it would be well if the sub- 

 ject were taken up and thoroughly worked out by some one residing 

 in the locality. 



III. — Observations on some impekfectlt known Madreporaria 

 FROM THE Cretaceous Formation of England. 



By Robert F. Tomes, F.G.S. 

 (PLATE XIV.) 



THE arrangement of a considerable collection of Cretaceous corals 

 in my own cabinet has been the means of identifying some 

 species not hitherto recorded as English, though well known else- 

 where, and at the same time of subjecting some others to a more 

 searching examination than they had before undergone. The 

 result has been the addition of the following genera to the English 

 list, viz. Ceratotrochus, Pleurosmilia, Barysmilia, Bhizangia, and 

 Leptophyllia. 



A very careful examination of the corals of the Eed Chalk of 

 Hunstanton has brought to light some affinities which have been 

 wholly overlooked, and which have occasioned their removal into 

 quite a different genus from the one in which they were placed by 

 their original describer. Similarly the genus Turbinoseris, from the 

 Lower Greensand of Atherfield, is now absorbed into an earlier 

 formed genus. 



