EXPIvANATION OF PLATE VII. 



Bengalichthys impennis, Annandale. 



Fig. I. — Skeleton of the pectoral fin of a specimen showing the 

 rotroverted fin-rays. 



,, 2. — Pelvic fin region of a male specimen, X r|-. 



,, 3- — Terminal part of a clasper of a male, seen from above, 

 X i^. 



Narcine indica, Henle. 



,; 4. — Part of the uterine wall of a gravid female sliowmg the 

 trophonemata. 



,, 5. — A single trophonema enlarged. 



,, 6, — Terminal part of a trophonema seen under the low power 

 of the microscope. 



,, 7- — Embryo seen from above. The branchial filaments are 



not shown. 

 ,, 8. — Embryo seen from the ventral surface. 

 ,, 9. — A branchial filament as seen with the low power of the 



microscope. 



