BY DR. KLEIN. ( .<3 



sule, or this liquid may be poured on it, after which it must, 

 be treated as before. The demonstration of the fine ner\ 

 the conjunctiva is not so easy as of those of the cornea, so that 

 a general idea of their distribution can only be obtained by a 

 comparison of a number of preparations. The nerve trunks, 

 composed of medullated fibres, divide in the superficial Inyer 

 of the mucosa into small branches, each containing two or 

 three medullated fibres, in which varicosities occur here and 

 there. These mostly accompany bloodvessels, following a 

 winding course, and, by their communications, forming a plex- 

 us. They give off under the epithelium non-medullated fibres, 

 by the anastomosis of which a scanty sub-epithelial network 

 is formed. I have seen fibres originating from this network 

 making their way towards the surface among the epithelium 

 cells, and dividing dichotoniously, but have been unable to 

 trace their further course. 



The mode of preparing the membrana nictitans is the same 

 as that for the cornea. The fresh membrane is placed for 

 twenty minutes in chloride of gold, and then in distilled water 

 until it is of a dark color. The epithelium of the anterior sur- 

 face is then stripped off with the sharp-pointed forceps, after 

 which the preparation is covered in glycerin. The objects 

 which present themselves are (1) The flask-shaped glands (with 

 their short, narrow ducts) lined with spheroidal, granular, nu- 

 cleated cells ; they are surrounded by a layer of spindle-shaped 

 cells, not unlike muscle-cells. (2) Granular, large, flat, branched 

 cells, brightly stained, possessing oblong, flat nuclei, and send- 

 ing out processes which communicate in the same way as cor- 

 nea corpuscles. (3) Pigment cells, some of which are much 

 branched and communicate with each other, while others are 

 isolated and clump-shaped. (4) A rich network of bloodves- 

 sels. (5) Nerves. From the plexus of medullated nerves, 

 separate medullated nerve fibres spring, which, close to their 

 origin, lose their medullary sheaths. The non-medullated 

 fibres possess numerous oblong nuclei. 



Nerves of the Skin. We have already had occasion to 

 describe the method of preparation to be adopted for the study 

 of the nerves in the skin. It may, however, be well to add 

 that, immediately after removing the preparation from the 

 gold solution, it is possible to cut sections. The nerve trunks, 

 which find their way from the subcutaneous tissue towards 

 the epidermis, unite at the surface of the corium to form a 

 dense network of non-medullated fibres, from which fine fibrils 

 stretch vertically into the rete Malpicjhii either as isolated 

 fibrils which pass up into the epithelium between two neigh- 

 boring papillae, or as groups of several fibrils which pierce the 

 tips of the papillae. In the rete Malpighii the nerve fibres often 

 divide, and occasionally communicate with their neighbors by 



