1920.] B. Prashad : Indian Torpedinidae. 105 



with well-developed longitudinal folds of skin surrounding it. Byes 

 large, protruding, much larger than the spirales. Spiracles semi- 

 lunar with a smooth margin. Dorsal fins small ; second much 

 better developed than the first. Pectorals horn-shaped, with a 

 convex outer edge and with feebly developed fin-rays. Ventrals a 

 little more than half the size of the pectorals. In a male specimen 

 small elongate lobes of skin are separated off on the inner side as 

 the clasper rudiments. Tail less than half the total length, with a 

 feebly-developed caudal. 



Measurements of a & specimen {in millimetres). 



The yolk-stalk is well developed and enters the body a little 

 in front of the anterior edge of the pectoral fins. The sac is a 

 large, somewhat triangular, bag-like structure and has the lower 

 surface thrown into folds. The branchial filaments (pi. vii, fig. 9), 

 which are to be seen protruding out of all the giU- openings, are long 

 but few in number at this advanced stage of the embryo. 



The specimens preserved in rectified spirit, after fixation in 

 formaldehyde (10%), are of a creamy colour, the yolk sac, how- 

 ever, is more ^'■ellowish. 



