Two New Species of Australian Land Leeches. 161 



3. The lateral mass, which is much smaller than either 



dorsal or ventral glands, lies on the dorsal side in 



front of the buccal cavity, the ducts of which pass 



back and enter tjie jaw beneath the longitudinal 



muscles [Fig. 5, 4.] 



In addition to these there is a large lobulated mass which is 



situated on the dorsal surface under (1). The ducts from this 



extend forward and open on the dorsal surface of the buccal 



cavity near to the angle of the jaw [Fig. 5, 2.] The remaining 



group is made up of much smaller glands, the cells of which are 



not arranged together in masses, nor do their ducts run together 



in groups. They open into the buccal cavity on all sides [Fig. 



5, 5.] 



All the salivary glands are made up of single more or less 

 spherical cells, of granulated protoplasm. The nucleus is situated 

 in the distal end of the cell and from the opposite end arises the 

 duct, which is continued to open on the surface [Fig. 8.] 



It is remarkable that each unicellular gland is connected with 

 the exterior by its own duct, so that in many instances the ducts 

 extend through several segments. By the contraction of the 

 muscles of the jaws, the secretion is forced out between the 

 denticles as soon as the bite is made. 



The salivary glands are all well supplied with blood from the 

 lateral blood vessel. 



IV. (Esophageal Glands. —In the paper on Philcemo7i putigens^ 

 I have referred to racemose glands in the oesophagus, which I 

 called the salivary glands; these I now prefer to call the 

 oesophageal and to keep the name " salivary " for the unicellular 

 glands just described. 



The same description applies to the oesophageal glands of 

 these species as to the glands of Philsemon, namely racemose, 

 consisting of large clear cells, and opening almost directly on to 

 the surface of the oesophagus [Fig. 9.j 



V. Connected with the cirrus sac is a strong glandular 

 development consisting of small unicellular glands, some of which 

 open directly into the cirrus sac, and others on to the surface 

 of the skin. 



L.c. supra. 



