52 C.C. NATURAL HISTORY SOCIETY. 



Oolite Mollusca.' If this identification is correct it is a most 

 valuable fossil. 



Another gem from the Great Oolite is a new species of Nautilus 

 allied to N. Baberi, but more umbilicate. 



Among the Gastropoda there is a good series from the Inferior 

 Oolite, mostly, however, from Dorset. Attention may be drawn to 

 examples of what are known as reversed Gastropoda, those which 

 coil the opposite way to what is usual among these shells : such are 

 Cirrus and Hamusina. It may be suggested that they should be 

 specially indicated in the labelling. 



The local Inferior Oolite rocks are somewhat deficient in 

 Gastropoda, but perhaps the Museum collection is not quite so 

 representative as it might be. The genus Nerinaea which is so 

 distinctive of many horizons in the Cotteswold Inferior Oolite, 

 might be better represented ; and in displaying such specimens 

 there should be sections shewing the internal structure. Enlarged 

 drawings of these internal folds might be affixed to tablets of speci- 

 mens with advantage. 



From the Great Oolite of Minchinhampton there is a very 

 good series of Gastropoda. The rare and striking genus Purpuroi- 

 dea is well represented — such specimens it is almost impossible to 

 obtain at the present day. A good Alaria is another noticeable 

 fossil ; and there is also a good series of those interesting shells 

 which seem to have departed so far from the normal style of 

 Gastropod growth — namely Patella and Capulus. 



Among the Pelecypoda, more usually known as Lamellibran- 

 chiata, or Bivalves there are very good series from the Lias, from 

 the Inferior Oolite, and from the Great Oolite. 



There is almost a superabundance of some of the Liassic 

 forms, such as Lima gigantea, L. punctata, and Gryphcea cymbium. 

 There is one magnificent example of Lima gigantea, with both valves 

 in an unusually good state of preservation. Of the rare Hippopodium 

 ponderosum there are many fine examples. And the genus Cardinia 

 shews many good specimens. 



In the Inferior Oolite series there are, of a shell which it seems 

 impossible to obtain now, more specimens than there was room to 

 display. This is a striking Per?ia of, I believe, a new, undescribed 

 species. It comes from Cold Comfort, where it used to be found in 

 sufliicient numbers to cause a certain rock-layer to be named the 

 ^^Perna-htd." But at the present day we are quite unable to say 

 where this Perna-hed is to be found. 



