I(i2 Proceedings of the Roynl Society of Victoria. 



These are in all probability modified epidermic cells like those 

 of the head. Each opens by its own duct. The glandular cells 

 in this position are smaller than those of the salivary glands, 

 and take the stains, such as Mayer's hsemalum, like the glands 

 in the head, while the salivary glands take indigo rather than 

 hsemalum. 



DESCRIPTION OF PLATES XV., XVI. 



Fig. 1. — Diagram Geobdella aiestraliensis., showing the number 

 of segments, annuli, nerve ganglia, nephridiopores, 

 and reproductive openings. 



Fig. 2. — Diagram of Geobdella ivhitmani, showing the relation 

 of the reproductive openings to the annuli. 



Fig. 3. — Diagram of G. australiensis, showing the relation of 

 the posterior organs to the alimentary canal, and the 

 intestine with its cfecum. 



Fig. 4. — Diagram of G. whitinajii, showing diverticula, intestine 

 and posterior organs. 



Fig. 5. — Diagrammatic representation of the salivary glands, 

 showing their relation to the jaws and the buccal 

 cavity on the right side of the nerve cord. 1. Large 

 dorsal mass opening on surface of the jaw. 2. Dorsal 

 mass opening into the buccal cavity. 3. Ventral 

 mass opening on the surface of the jaw. 4. Small 

 dorsal anterior mass opening on the surface of the 

 jaw. 



Fig. 6. — Transverse section through G. zvhitmani (camera lucida), 

 showing the position of the salivary glands. Gl. 1. 

 Dorsal gland opening on the jaw. Gl. 2. Dorsal 

 gland opening into buccal cavity. 3. Ducts of the 

 ventral salivary glands opening on the jaws. B.v. 

 Lateral blood vessel. Neph. Nepliridium 1. 



Fig. 7. — Transverse section across G. whitmani (camera lucida) at 

 the level of the pharynx passing into the oesophagus. 

 Ph. pharynx wall. OEs. gl. esophageal gland. Gl. 

 L dorsal salivary gland opening on the jaw. D. \. 

 ducts of dorsal salivary gland connected with the 

 jaws. D. 2. ducts of salivary gland (Gl. 2) to open 



