MISCELLANEOUS NOTES. 



417 



In S. China, where I observed them several years, these insects never 

 increased noticeably in any season ; they are slow breeders and their eggs 

 are probably often destroyed. They are also somewhat restricted in their 

 food, and exposed in their habit of sitting on leaves of shrubs, and are 

 inactive compared to most of the Acridiidce. In countries like China where 

 every form of woody vegetation is cut for fuel ; it is probable that the 

 Mastacides are rapidly diminishing in numbers, and their place taken by 

 other forms of Acridiidce which can better adapt themselves to altered 

 conditions of life. I much regret having done no anatomical work on the 

 Mastacides when I had plenty of material : they appear to me to be a very 

 ancient form of the Acridiidce. 



TRINIDiD, B.W.I. , 



7th Januanj 1913. 



J. C. KERSH4W. 



No. XXXV.— NOTES ON THE CUTCH AMMONITES. 



IV. 



The Ler-Hamundka Ellipse. 

 After digressing to Keera on the S. edge of the Great Runn I return to 

 the line of the Charwar Fault. While calling it a fault in obedience to 

 Bianford and Wynne, one cannot help having a secret desire that it may not 

 be a fault so much as a crumple. I know it is heresy to say so, and I am 

 prepared for the stake : but the fascination lies in this, that if it is a 

 crumple, the whole scheme of Cutch simplifies itself into three crumples, 

 caused 1 suppose by the drift or suction of land towards the North. The 

 following sketch would represent a section from Putchum Island due 

 South :— 



9 



fi U /S N 





J£A L £ V£L 



1. 

 2. 

 3. 

 4. 

 5. 



6. 



Gulf of Cutch. 



Alluvium. 



Tertiary. 



Trap — of Cretaceous Era. 



Cretaceous and highest Juras- 



8. Jooria Hills (Kim., Oxf. 



Callov.) 



9. Runn — overlying out-crops of 



Jure. (Kim., Oxf. and Up- 

 Callov.). 

 10. Putchum : Gora Donger, 

 Low-Callov. and Bath. 

 Putchum : Kala Donger, 

 Bathonian. 



11. 



Jurassics (Kimeridge, Oxford 

 and Callovian). 

 7. Highest Jurassics, Plain of 

 Bhuj. 



The question at present is this : — Is No. 6, the Katrol-Charwar range, 

 faulted or not along its N. side : or does it curve under No. 7, the Bhuj 

 plain. As said before, the N. scarp of the '■ Vanguard ' hills of the 

 Fakirwadi section looks as if faulted : there is no sign of any N. slope of 

 an anticline. But in many other parts of the range — ^Samatra, Bharasar, 

 parts of Fakirwadi, and the Ler-Hamundra section, the last that one sees 

 of the range of hills before one gets down on to the Bhuj plain, is the 

 N. slope of an anticline, with E. and W. axis. Hence though faulted m 

 parts by extra strong folding or crushing, I am inclined to believe that 

 the beds of No. 6 do curve under >fo. 7, to reappear at 8 (the Jooria- 



