INTRODUCTION. 3 



The older Putchum group has only yielded Macrocephalites macrocephalus, but 

 inasmuch as this species has its chief development in the Oharee-group of Kutch 

 I do not think this affects the case, and we may assume that the Folyphemu8'\\m.Q- 

 stone of Mazdr Drik really represents the Oharee-group of Kutch, and it only 

 remains to determine which subdivision of the Oharee-group the Polyphemus- 

 limestone is likely to represent. 



Professor Waagen has divided the Oharee-group into four sub-divisions which 

 in descending order are as follows : — 



4. Dhosa Oolite. 



8. Athleta-beds. 



2. Anc^ps-beds, 



1. Macrocephalus-beds. 



From the above list it will be seen that seven species, viz., — 



Nautilus giganieus 



Macrocephalites maerocephalus 

 ,, subcompresstis 



Peritphinetes balinensia 



,, ■ recuperoi 



„ grantanum 



characterize the Maerocephalus-beds in Kutch, three species, viz.,— 



Nautilus wandaensis 

 Macrocephalites fransiens 

 i> poli/phewius 



occur in the upper subdivision, the Dhosa Oolite of Kutch, while the intermediate 

 Anceps and Athleta beds are represented each by one species, viz., — 

 Macrocephalites opis 



in the Anceps beds and 



Peritphinetes aherrans 



in the Athleta beds. 



Although the distribution of the species as shown above gives no absolute proof, 

 the greater majority of the species are represented by those forms which are 

 characteristic of the Macrocephalus beds in Kutch. Until this is disproved, we 

 must consider the Polyphemus-limestone to be the representative of the Macroce- 

 phalus beds in Kutch and to be homotaxial with the lower Kellaways beds of Europe, 



The evidence afforded by the two species of Brachiopods together with 

 Sphceroceras bullatum, d^Orb., which seem to indicate a somewhat lower horizon, 

 viz., Inferior or Great Oolite, is not at present sufficiently strong to affect the above 

 view. 



Future examinations will, I trust, decide whether the Polyphemus-Mva^iojiQ 

 of Kutch is capable of being subdivided into divisions similar .tq those of the 

 Charee-group of Kutch. 



