272 Keeping — Dhcovery of Gault at Upware, 



studded with irregular spines, as in Terehratula resupinata, Dav. 

 Septum short and but little elevated. 



Of this somewhat doubtful species I have several examples from 

 the Lower Greensand of Folkestone and Godalming. The Folke- 

 stone specimens are filled with silex, and possess the loop in the 

 most perfect state of preservation. It is interesting to observe that 

 the loop in these specimens approaches as near to the front in the 

 young and half gi'own as in the adult shell. 



6. Terehratella ohlonga, Sow. Loop elongated and reflected, 

 doubly attached ; mesial septum (in the adult shell) reaching to 

 nearly the middle of the smaller valve. 



VII. — ^Discovery of Gault with Phosphatic Stratum at Upware. 

 By H. Keeping, Assistant Curator of Woodwardian Museum, Cambridge. 



HAVING frequently visited Upware during the past fourteen 

 months, for the purpose of collecting from the Lower Green- 

 sand, in which I have been very successful, having obtained for this 

 Museum a beautiful and choice collection, I have had every oppor- 

 tunity of observing the progress of the excavations, and of noting 

 the relative position of the beds. 



When there in February last, I picked up a phosphatised specimen 

 of Ammonites interruptus at a short distance from the cropping-out 

 of the Coral-rag. This led me to believe that the Gault might be 

 found ; accordingly, on the 24th of March last, I sunk a pit. After 

 passing through about seven feet of clay I came to a phosphatic bed, 

 from which I collected the following fossils, proving, I believe, the 

 whole to be Gault : — 



Ammonites serratiis, Nucula ovata, 



Ammonites interruptus, Nucula pectinata, 



Baculites ,, Dentalium ellipticum, 



Belemnites minimus, Inoceramus concentricus. 



Belemnites attenuatns. 

 The pit sunk was about ten feet in depth. The phosphatic-bed 

 (see i, in section) from which the fossils were derived averages five 

 inches in thickness. After jDassing through another foot of the non- 

 fossiliferous Gault I entered the Lower Greensand {g), and on 

 sinking two feet lower the rising of the water compelled me to desist. 

 It will be seen from the section that the Kimmeridge Clay is 

 unconformable to the Coral-rag ; and it would appear that, at the 

 time of the deposition of* the Kimmeridge Clay, a quantity of its 

 broken and often rounded fragments became inteiTuixed with it, so 

 that in the vicinity of junction it actually presents the appearance 

 of Boulder-drift. This was at first puzzling, but when the position 

 of the bed was determined it was seen to be a natural consequence. 



The collection of fossils obtained is small, but, considering that it 

 is the production of a pit of about a yard square, they are as nu- 

 merous as we can expect ; the distinct species being eight, and there 

 are many specimens. Although the Gault has been found in this 

 country, few fossils have been met with in it, and I know of no 



