454 GEOLOGY OF THE ENVIRONS OF NICE. — APPENDIX. 



All the shells described in the following catalogue, are si- 

 milar to those, though not in so high a state of preservation, 

 which were found so abundantly some years ago at Grignon 

 in France, and which abound in various parts of that country, 

 as well as in Italy. For the most part, they are exceedingly 

 minute, many of them requiring the power of a solar micro- 

 scope to determine their characters with precision. 



The whole number enumerated amounts to two hundred 

 and twenty-five ; of these, thirty-three species, which Captain 

 Brown considers new, he has particularly described and figu- 

 red. He has also described two new madrepores. Among 

 them are some odd valves of a new Chiton, a genus not even 

 noticed by Brocchi, in his Conchologia Fossile Subapennina : 

 likewise several of the Haliotis striata ; a genus also unknown 

 or at least not included in the work above quoted ; so that all 

 the Linnean Genera have been found in this neighbourhood 

 except the Argonauta. 



For the sake of brevity, Captain Brown has confined his re- 

 ferences to the latest authority for description, and the best 

 for the figure of the shell. 



Together with the engravings of these fossil remains, I have 

 given a small Map of the Environs of Nice. This is principal- 

 ly taken from a manuscript map in the possession of Mr Ris- 

 so, in some degree corrected and verified by the rough obser- 

 vations I was able to make with one of Schmalcalder's milita- 

 ry compasses, an instrument of sufficient accuracy for the pur- 

 poses I required. It will be satisfactory to the reader to ob- 

 serve the bearings of the different localities ; and the colouring 

 of the map will enable him to distinguish the extent of the 

 different formations and deposites I have had occasion to de- 

 scribe. 



I. 



