THE 



GEOLOGICAL MAGAZINE. 



m. XXVIII.— OCTOBER, 1866. 



OI^IC3-I3^J^^L JLS-TIOXilBS. 



I. — On some Flint-cokes fkom the Indus, Upper Scinde. 



By John Evans, P.E.S., F.S.A., Sec. G.S., etc. 



(PLATE XVI.) 



THE following letter lias been forwarded to me witli a request to 

 make a few remarks upon the flint-cores mentioned by General 

 Twemlow : — 



To the Editor of the Geological Magazine. 



Sir, — With reference to the letter of A. B.Wynne, Esq., F.G.S., of 

 the Geological Survey of India, in your number of 1st June, 1866, 

 it may interest him and his colleague, W. T. Blanford, Esq., F.G.S., 

 and perhaps the scientific public generally, if you would undertake 

 to delineate and describe the three remarkable fossils herewith sent. 



They have just been brought to me (Overland), sent by my son, 

 Lieut. Edward D'Oyly Twemlow, of the Eoyal Bombay Engineers, 

 and were found by him " three feet below the roch in the bed of the 

 river" (Indus) where he is superintending excavations connected 

 with a canal, near Shikarpoor, in Upper Scinde. 



I shall be happy to present the specimens, after they have been 

 described, to the Ethnological Department of the British Museum. 

 I am. Sir, yoiirs faithfully, 

 George Twemlow, Major-General, E.A. 

 PoYLE Lodge, Guildford. 



The interest attaching to the flint-cores or nuclei, figured on 

 Plate XVI., rests principally on the beautiful regularity of their 

 form, and the circumstances under which they have been discovered. 

 The process by which flakes or knives of flint are produced has 

 been so often described that it is needless here to enter into any of 

 its details. It will be enough to observe that such flakes or knives, 

 being chipped off in succession from a mass of stone, there must in 

 all cases remain, after the process is completed, a block, showing the 

 facets from which the last flakes dislodged have been struck off. 



VOL. III. NO. XXVIII. 28 



