1856.] Proceedings of the Asiatic Society. 423 



Memorandum of corrections which ought to he made in Mr. Gree- 

 nougKs Geological Map of India. 



1. — The fossils found in the boring at Port "William, Calcutta, 

 were all of recent species, and not of Sewalik age. 



2. — In the neighbourhood of Silhet, the Cossia hills, &c. the 

 words " nummulite bed" under the name Silhet, ought to be remov- 

 ed — none such exists there. 



3. — "Silhet Coalfield" placed on the map to the west of the 

 town of Pondua, to be erased. No Coal near this. 



4. — Jynhanpoor on the map ought to be Jynteapoor. 



5. —The words " Coal many hundred feet thick" under Jyntea- 

 poor, contain an assertion totally unfounded. 



6. — A peculiar colour is carried all along the base of the hills 

 here, between the tint of green representing the Eocene, and the 

 pink of the gneiss, &c. for which no representation is given in the 

 index of colours. We presume this to be altogether a mistake of 

 the colourers. 



7. — The dotted lines for colour boundaries near the west of the 

 Cossia and the Garrow hills have been altogether disregarded. 



8. — The granite is not known to extend along the northern face 

 or slope of the Cossia and Garrow hills — but is found in detached 

 patches in the hills. 



9. — At and near to the intersection of the parallels of 25° N. lat. 

 and 91° East long., the country is entirely alluvial. The words 

 *' nummulite beds, and limestone" are therefore erroneously in- 

 serted. 



10. — The " Cyrtoma, a new species of the fossil Ecchinida," 

 shewn as occurring in the gneiss is from the Eocene. The Cyrtoma, 

 is a genus not species. 



11. — The mode of representing the area covered by the coal- 

 bearing rocks in Bengal gives a very erroneous idea of the geology 

 of the country. They do not in auy known case form a continuous 

 band, but invariably occur in isolated basins or areas, included in 

 the gneiss. 



12. — " Patturghatta" near to Colgoug is on the river Ganges. 

 There is no " limestone" there. 



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