PLATE C. 



Alimentary System. 



Fig. 1. — a. Head with the sahvary ducts, and at s,s 

 the sahvary posterior lobes. 



/. Tlie hgameiit supporting the proventrical, or 

 gizzard of Dufour. 



c. Tlie crop, or sucking stomach. 



d. The ihuni, or large intestine, passing into ;*, the 

 dilated coecum, or rectum. 



X. Sebacic glands, in the neighbourhood of p, the 

 anal plate. 



V. The proventrical, ending in the pylorus. 



v'. The convoluted and attenuated part of the 

 stomach, which, forming a complete loop, returns the 

 food to the upper part of the proventrical. 



h. Part of the hepatic vessels which add the bile to 

 form the nourishing chyle. — After Leon Dufour. 



Nervous System. 



Fig. 2. — c. g. The bilobed cephalic ganglion, which 

 gives off two bundles of nerves to the oculi, j), p, 

 and two smaller bundles to the ocelli. The middle 

 fasciculus passes to the base of the rostrum. 



t. (J. Thoracic ganglion, showing the numerous 

 nerves, t. n., which supply the wings and the legs. This 

 large ganglion divides at its lower extremity into two 

 trunks ((/-), which distribute their respective filaments 

 to the abdominal viscera, and run largely also at /", /' 

 to the organs of generation. — After Leon Dufour. 



Fig. 3. — Part of the lower stomach of Apliropliora, 

 showing its inner glandular structure and the loops 

 at h. 



