No. 2.] A NEW MARINE TRICLAD. £73 
and difficult to analyze. A complete lack of pigment adds to 
the difficulty of locating the cells peculiar to this interesting 
tissue.! 
On the other hand the glands are very easily studied. In 
specimens stained with Weigert’s picrocarmine and mounted 
in glycerine they take on a deep yellow or orange color, in 
Czokor’s alum cochineal they are colored a dull brick red. In 
both cases they contrast strongly with the surrounding tissue. 
At first sight the glands appear to have a very diffuse distri- 
bution, but closer study enables one to separate them into the 
following groups (Fig. 7): 
1. There is a narrow zone of slime-glands completely sur- 
rounding the body just within the lower ventral edge. This 
zone, which appears to be common to many other Triclads 
(vide Lang, '81b, Iijima, '84, Woodworth, '91), is broad in the 
head region, distinctly narrower in the tail, and very narrow 
along either side of the middle of the body. 
2. A large group of slime-glands in the head region. These 
have an anterior trend and open on the dorsal surface. In the 
region of the eyes they separate into three bundles, one of 
which passes between the eyes and over the brain, while the 
two others pass laterally to the eyes. The three bundles again 
intermingle in the przeocular region. 
3. A somewhat smaller group of slime-glands at the opposite 
end of the body with a posterior trend and openings on the 
dorsal surface. 
4. A cluster of glands corresponding to the salivary glands 
of Iijima (84), and Chichkoff (92). They are found in the 
parenchyma just in front and on either side of the pharynx, to 
which they converge, and into which they open near its tip. 
5. A cluster of glands surrounding the vaginal opening in 
the genital atrium (Fig. 7 and Fig. 4¢¢7). 
So far as their reaction to the stains is concerned, the 
glands of these five groups are identical in Syncelidium. In 
B. candida, however, the salivary glands have a_ specific 
reaction: they take on a very intense blue stain with alum 
1 In this lack of pigment Syvcelidium resembles the fresh water Dendrocelum 
lacteum. 
