470 



Dr. A. Willey. 



. 4. Another egg of N. macromphalus, seen from above, with the longitudinal 

 slit in the upper wall of the outer capsule widened, out so as. to expose the 

 inner capsule to view. 



. 5. Inner capsule of another egg to show the dorsal ridge along the dorsal 

 suture (d. s.) with its anterior terminal prolongation, and the lateral suture 

 (Z. s.~). o. c., remains of outer capsule. 



ruptured along the sutures. In the middle line of the lower surface 

 of the inner capsule there is a slight longitudinal groove, and other 

 unimportant grooves often occur. Where the outer capsule is united 

 to the inner capsule there is usually a depression or flattening in the 

 wall of the latter. 



The vitellus (tig. 6) does not fill the entire cavity of the inner 

 capsule, but is surmounted by a layer of colourless, somewhat cloudy, 

 viscid albumen which, is massed up, as it were, at the two extremities 

 of the egg. The yolk is of a rich brown colour, of very fluid con 

 sistency, and sub-translucent. The surface of the vitellus is quite 

 smooth. The length of the inner capsule is about 26 mm., while that 

 of the enclosed vitellus is 17 mm. 



I am not in a position to say much, about the embryonic area at 

 present, but I have observed an area pellucida about the middle of 



