
88 LIVERPOOL BIOLOGICAL SOCIETY. 
My work has been carried on in the zoological laboratory 
in University College, Liverpool. 
THE ADULT AWGUIS FRAGILIS. 
In Spencer’s paper* the pineal eye is figured as a hollow 
sphere, in which the dorsal portion has been pressed in. 
In my sections, which are vertical and longitudinal like 
Spencer’s, the organ is distinctly pear-shaped, the narrower 
end of it being directed ventrally and posteriorly (see fig. 
1, Plate I.). Further both De Graaf and Spencer affirm, 
that in Angus fragilis the pineal eye is separated off from 
the epiphysis. ‘‘The epiphysis,’ says Spencer, “‘ was 
remarkable for running forward until very close to the 
eye, whilst its distal rounded extremity was invested by 
pigment cells.’”’ And he continues: ‘‘As described by 
De Graaf, the eye is separated off from the epiphysis.” 
But according to my preparations that is not the case. 
On the contrary, from the ventral side of the distal portion 
of the epiphysis a small stalk is given off which goes to 
the eye and spreads out to form the retina. 
Spencer does not agree with De Graaf, who had 
described the lens as being completely separated off from 
the retina, and he states, that the lens is directly con- 
tinuous with the retina. In his figure the connecting part 
between lens and retina is almost as thick as those organs 
themselves. But this does not appear to be the case in 
my specimens. I find only very small portions of connec- 
tive tissue which join the lens to the retina. In the retina 
I find essentially the same layers as Spencer, although 
I must remark, that his figure, being a low power view, 
does not show all details, and is not quite easy to under- 
. * On the Presence and Structure of the Pineal Eye in Lacertilia,” Quar. 
Journ. of Micr. Science for October, 1886. 

