140 
Transactions of the Boyal Society of South Africa. 
usual position for them seems to be in the body wall just underneath the 
first right and left bundles of dorsal papillae. The salivary glands have 
this position in Coryphella, Berghia, Favorimts, and Bizzolia. In Spurilla 
they end in the body wall underneath the first bunch of papillae, but the 
greater portion of the glands lie on the oesophagus and crop. In Calma 
the position is as for Simrilla. In Tritonia the salivary glands are short, 
stout structures lying along the oesophagus. In Marionia and in Doto 
the glands are voluminous and are spread around the posterior end of the 
pharynx. The ducts of the salivary glands pass, as already mentioned 
Fig. I. 
along with oesophagus through the nerve chord ; they are extremely 
delicate and may have a diameter of even less than -005 mm. 
The mouth glands agree in opening into the mouth cavity, but in 
nothing else. In Calma, Spicrilla, Berghia, and Facelina there are right 
and left portions opening into a common duct which lies mid-ventrally to 
the pharynx. In Doto, however, there is only a left gland. In the others 
the glands are throughout their lengths muscular, or at least the common 
duct is muscular. In Doto the ''reservoirs " of the gland are not muscular 
and neither is the median duct. In Doto the gland is acinose — in the 
others the glands are tubular. 
