ON THE MICROSCOPIC ANATOMY OF AN INSECT LARVA. 611 
c. Saw-like organs, or Pristognaths. 
d. Central prehensile organ, or Mesognatli. 
e. Muscle of Tarsognath. 
/. Compound eye. 
g. Toothed-plate-like jaws, or Platygnaths, covering the Cha- 
ractognaths. 
h. Cephalic ganglion, or hrain. 
i. Ventral chain of ganglia. 
O O 
j. Muscular pharynx. 
Tc. Anterior air-sacs, or trachea-bags. 
l. Heart, or dorsal vessel. 
m. (Esophagus, 
m'. Stomach. 
n. Kudimentary reproductive organs. 
0 . Posterior air-sacs. 
p. Pyriform enlargement of the intestine. 
g. Glandular appendages. 
r. Lateral plume. 
s. Serrated appendages. 
t. Terminal plates. 
u. Terminal plume. 
. 2. The 11th and last ganglia of the ventral chain. 
3. The air-sacs (a), with attached tracheae (6), and the supposed salivary 
organs (c, d, e). 
4. Compound eye of Corethra larva. 
5. Pharynx and oesophagus. 
6. Terminal plate, showing parietal cells and trachea. 
7. Part of the dorsal vessel, or heart, showing the valves and ganglia. 
8. Posterior portion of the alimentary canal, showing — 
a. Stomach. 
h. Intestine. 
c. Pyriform enlargement. 
d. The four glandular appendages. 
9. Part of one of the hairs forming the lateral plume. 
10. Hair from the surface of the 8th segment. 
11. One of the saw-like appendages from the mouth. 
