JOURN. Q.M.C. 



Ser. 2, Vol. XL, PI. 22. 



Fig. 1. 



Fig. 3. 



\ 



T- 



/ 



Fig. 2. ^^S- 4. 



E. M. Nelson et A. A. C. E. Merlin, photomicrogr. 



Illustrating Messrs. Nelson and Merlin's Notes. 



