174 WHEELER. [Von DX, 
cochineal, while the glands of the other categories stain dull 
brick red like their homologues in Syucewlidium. So deep is 
the stain that full-grown specimens of 4. candida mounted zz 
toto in clove-oil or balsam show the salivary glands as a mass 
of nodulated fibres radiating from the pharynx into the body. 
v. Graff (79) supposed that the lesions in the gill-lamellz of 
Limulus were produced by some chitin-solvent in the secretion 
of the slime-glands of Ldelloura. May not the differential 
stain of the salivary glands in this form point to the pharynx 
as the organ which emits this chitin-solvent? 
v. Graff describes in Bdelloura two acinose glands, opening 
one on either side into the pharynx. I fail to find these unless 
they be the “salivary glands.” In that case the word acinose 
(“traubenformig’”’) is certainly ill-chosen. Moreover, these 
glands are not separable into two clusters in my specimens. 
In regard to the slime-ducts and their openings in Triclads, 
I am unable to share the view recently advanced by Chichkoff 
(92). According to this author (p. 485) there are no determi- 
nate ducts or orifices; in order to reach the surface of the 
body the mucus makes a way for itself through the paren- 
chyma and hypodermis. ‘ L’excrétion,” he says, “se fait sur 
différents points, suivant les besoins ; selon que |’excitation se 
produit sur la face dorsale ou ventrale, la substance se dirige 
vers l’une ou vers l’autre, pour étre expulsée. Ce que Iijima 
désigne dans ses figures sous le terme de ‘ Ausmiindungsstelle 
der Schleimdriisen’ n’est rien d’autre que des trainées de 
mucosité sur le point de s’échapper du dehors. Leur présence, 
observée presque toujours sur les coupes, est due uniquement 
aux conditions dans lesquelles l’animal a été fixe.” And again 
at p. 486-487 he adds: “ Les ‘ Ausmiindungsstellen’ disparais- 
sent compléetement, si l’on fixe l’animal en évitant la présence 
de la substance muqueuse dans le parenchyme, autrement dit, 
si on lui donne le temps d’expulser tout ce que ses glandes ont 
sécrété, du moment ov la spatule l’a pris.” 
Granting that all preceding observers have mistaken the 
products of secretion for portions of the glands, does it follow 
that the slime-glands have no determinate ducts and openings? 
Not in the least. Such delicate structures as these ducts 
