By Professor T. Rupert Jones, F.B.S., F.G.S., 8fc. 145 



A still more interesting specimen (Fig. 4) of root-marks in Sarsen 

 stone is in the Museum of Practical Geology, Jermyn Street, London; 

 marked xix ~. Mr. W. Cunningtoti, F.G.S., found it in 1872, on 

 Lockeridge Down, three miles west of Marlborough, and one mile 

 north of the main road. The impression, 7?in. long and fin. wide, 

 represents the lower end of a tap-root, with numerous rootlets going 

 off from it at angles varying from 5° to 30°. Some, as shown by 

 the holes on the side of the hollow, are in a definite row, others are 

 scattered ; and at the lower end a group of twelve or more holes 

 shows that the root terminated in a brush of rootlets. Some of the 

 holes in the stone can be penetrated with a wire for several inches. 



Fig. 3. Apiece of Sarsen with sub-parallel and sub -cylindrical rootlets of Palm (?) 

 Collected by T. Codrington, Esq., C.E., F.G.S., in Wiltshire. In the 

 British Museum (Natural History). Reduced one-half. 



Whether some of the perpendicular rootlets, sometimes closely 

 parallel, or nearly so, belong to water-plants, such as Zostera, or if 

 all belonged to maritime palms, would be an interesting enquiry. 

 Both the sand-banks, that are now sands with concretions, and the 

 shingle, now the pebbly part of the sands, must have been laid down 



VOL. XXIII. — NO. LXVIII. It 



