BY W. J. McKAY. 885 



(3) That the shape of the lens in the youngest stages of Hinulia 

 is similar to the lens in Cydodus, the eye in the latter being in a 

 transitional state. 



(4) As in some of the terms ( Varanus, etc.) pigment is developed 

 in the lens, so also in Hinulia is slight pigmentation present. 



(5) The lens is composed of columnar nucleated cells. 



(6) Retina. The columnar cells called rods are present. 



(7) Nuclei are present in the rods in the later stages, a point not 

 ascertained by Spencer in his higher forms. 



(8) That the pigment is disposed in horizontal layers in the rods, 

 and that where the rods join the lens the pigment reaches through 

 the whole thickness of the retina. 



(9) That a humour exists in the optic vesicle. 



(10) That the rods have processes attached to the lower exti'emi- 

 ties. 



(11) That spherical nucleated cells, similar to the N' layer of 

 Eatteria exist in Hinulia. 



(12) That the molecular layer (if it be such) of Hinulia is placed 

 in a very different position to the molecular layer of Hatteria and 



Varanus. 



(13) That layers of spindle-shaped elements exist, which have 

 no correspondence to any of the eleaients in Hatteria or Varanus. 



(14) That layers of triangular-shaped elements exist which have 

 no correspondence to anything in Spencer's form. 



(15) That no such bodies as cones exist in Hinulia. 



(16) That the epii)hysis as in Calotes, Seps, etc., is separated 

 from the eye, and that no such structure as the pineal stalk is 

 ])resent in either of the forms examined. 



(17) That the eye may be supposed to draw its blood sup])ly 

 from the large vessel so constantly present directly beneath it. 



