60 THE AMERICAN MONTHLY [Apr. 



appears to be made up of granular pigment matter 

 loosely put together with coarser and more dense, oval 

 or irregularly shaped pigmented masses frequently scat- 

 tered in the substance. By some methods of hardening 

 the pigment appears not very unlike epithelial cells but 

 such does not appear to be the case in fresh eyes or 

 thoso treated with Osmic Acid. 



The pigment rests posteriorly upon the choroid coat 

 of the eye and the anterior portion is limited by the 

 tapetum to which it adheres. In fresh eyes and those 

 stained by the various methods the color remains the 

 same, being a brownish red. 



DESCEIPTION OF FIGURES. 



Fig. 1. Polar section of eye. A, pavement epithelium ; 

 B, cornea; C, lens ; D, pigmented epithelium; E^mem- 

 brana limitans interna ; F, ganglion cells of retinal 

 nerve; Gr, spindle cells; H, rod and cone cells; J, tape- 

 tum ; K, pigment; L, choroid ; M, memb. lim. exter. 



Fig. II. Diagramatic sketch of the arrangement of the 

 interna] parts of the eye, from one pole to the other. 



Fig. III. The arrangement of the terminal branches 

 of the complementary nerve in relation to the pigmented 

 epithelium. 



Fig. IV. Equatorial section of the eye about one-third 

 the distance from the posterior portion of the eye. 

 A, pig. epithel.; B, cross-section of optic nerve ; CC, 

 cross-sections of complementary nerve; D, pigment; 

 E, tapetum ; F, retina. 



Figures I, II, IV, were drawn with a camera lucida 

 and are supplied with a scale. 



Microscopic Billingsgate. 



The following separate phrases are all taken from a 

 recently published article professing to be a notice of 

 Grates' Mega-microscope : 



