JOURNAL OF MICROSCOPICAL SCIENCE. 



DESCRIPTION OF PLATE II, 



Illustrating the Structure of the Tooth-pulp, and of the 

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

 ' Archiv ') . 



Fig. 

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

 treated with nitric acid, showing the multicaudate odontoblasts. 



2. — The same, in which tlie 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 ; the large nerve 

 sending its twigs, one to each liair, the tracheau vessels, and the 

 liypodermic tissue. 



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

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

 cavated, and tlie cellular hypodermis. 



0. — L/icanus cervus, drawn in outline to show the origin of the antennary 

 nerve, and the antenna; themselves, with tlie shoe-shaped terminal 

 joint. 



