334 PROCEEDINGS OF SECTION D. 



(3) The shape of the lens in the youngest stages of Hinulia is 

 similar to the lens in Cyclodus, the eye in the latter being in 

 a transitional state. 



(4) As in some of the forms (Varanus, etc.), pigment is devel- 

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



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



(6) In the 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 highest forms. 



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

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

 whole thickness of the retina. 



(9) The humour exists in the optic vesicle, which appears in 

 prepared specimens as fibrillse lining the vesicle. 



(10) The rods have processes attached to their lower extremities. 



(11) Spherical nucleated cells similar to the (N' ) layer of the 

 Hatteria exist in Hinulia. 



(12) 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) No such bodies as cones exist in Hinulia. 



(14) Layers of spindle-shaped elements exist, which have no 

 correspondence to any of the elements in Hinulia or Varanus. 



(15) Layers of triangular-shaped elements exist, which have no 

 correspondence to anything in Spencer's forms. 



(16) The epiphysis as in Calotes, Seps, etc., is separated from 

 the eye, and no such structure as the pineal stalk is present in 

 either of the forms examined. 



4.— CENSUS OF THE AUSTRALIAN MOLLUSCA. 



By Ralph Tate, F.L.S., F.G.S., Professor of Natural Science in 

 the University of Adelaide. 



5.— NEW AUSTRALIAN SPECIES OF NOTABLE 

 GENERA OF MOLLUSCA. 



By Ralph Tate, F.L.S., F.G.S., Professor of Natural Science in 

 the University of Adelaide. 



