JOURNAL OF MICROSCOPICAL SCIENCE. 



DESCRIPTION OF PLATE II, 



Illustratin;^ the Structure of the Tooth-pulp, and of the 

 Stag-beetle's Auditory Organ (from Max Schultze's 

 ' Archiv ') . 



Fig. 

 1. — Section through the tooth-pulp of an embryo calf, 30 centim. long, 

 treated with nitric acid, showing the mnlticandate odontoblasts. 



2. — The same, in which the layer of cells has been separated from the 

 " substance" of the dentine. 



3. — Nerve-endings in the pulp of the incisor of a young rabbit. The pro- 

 cesses of the odontoblasts are torn away. 



4. — Terminal joint of the antenna of the stag-beetle, partly opened, show- 

 ing the auditory " pit " and hairs on the surface ; tlie large nerve 

 sending its twigs, one to each hair, the trachean vessels, and the 

 hypodermic tissue. 



5. — More magnified view of the hairs, sliowing their connection with the 

 nerves by oval cells; also the two chitin-laycrs, the superior ex- 

 cavated, and the cellular hypodermis. 



6. — Jmcanus cerviis, drawn in outline to show the origin of the antennary 

 nerve, and the antennae themselves, with the shoe-shaped terminal 

 joint. 



