THE GARDEN SLUG. 63: 
the former to the left. Unravel the intestine. Notice 
that the liver is divided into two lobes. From the 
centre of each pass short hepatic ducts, which empty 
themselves into the alimentary canal on opposite 
sides. In front of the hepatic ducts the stomach 
expands slightly forwards, and then suddenly con- 
tracts, to form the cesophagus. Below, and on each 
side of the anterior portion of the stomach, lie two. 
large, white, lobed salivary glands. Detach them 
from the stomach, and notice the ducts passing 
under the nerve collar to open on each side of the 
mouth. Cut the narrow cesophagus and salivary 
ducts, and taking hold of the buccal mass with 
the iorceps, draw the cut cesophagus through the 
nerve collar. Turn back the buccal mass; cut it 
out ; remove it to a glass slide; open it; extract and 
examine the horny upper lip and the odontophore. 
Find the central line of teeth of the odontophore— 
rachis teeth; they differ from the lateral teeth in 
being tricuspid. The transverse rows of teeth are 
straight ; there are about thirty-six on each side of 
the rachis tooth. Examine with the microscope 
portions of the cesophagus; notice the epithelial 
cells; examine the salivary glands, the liver, and the 
alimentary canal. 
6. Reproductive system.—Notice the purple ovo-testis, 
like a bunch of grapes; the white hermaphrodite 
duct leading from it to the swollen, pale purple, con- 
voluted tube, in which are combined the oviduct and 
the vas deferens. The cecal tongue-shaped portion 
projecting backward from junction of the hermaphro- 
dite duct, is the albumen gland. Alongside the 
anterior portion of this tube is plainly to be seen the 
