42 s. GOTO. 



however, liiere is no gland connected witli these chitinous pieces.'^ 

 These pieces nn"ght be supposed to help the parasite in attacliing itself 

 to the host, were it not for the fact that they are on the dorsal side of 

 tlie hody, and are therefore presumably of no use in that respect ; but 

 I am not able to suggest any other use o»f them. 



If, now, we compai'e the structure of the glands hitherto de- 

 scribed, we find a close similarity of their ])roducts with one another as 

 well as with those of the sticky glands of Gijrodactijh'drr. The clear, 

 transparent fluid that fills the vacuoles of the lateral glands of T, 

 sinuatiim and T. hiparafiiticum, might l)e mentioned as exceptions ; but 

 we find in their eiferent ducts just the same gnmular sul)stance as in 

 the anterior glands, showing ])robably that the clear contents of the 

 cells assume the character ot granules in iheir passage ah^ng the duct. 

 That the anterior glands of Giirodactijh'ikr are sticky, and are used for 

 attaehment can be den^oristrated luider tlie microscc^pe ; so that I 

 believe it is not much amiss to reganb ns I do, the glands above 

 described as having the same function. It may also be mentioned, in 

 additi(3n, that Langley-^ and Reid'''^ have described granules in 

 the mucous glands of some vertebrates, which seem to me in many 

 respects similar to those of the glands above descri1)ed. 



It is not perhiips out of place here to observe that the position of 

 the opening of the posterior sticky glands of MonocottjJe d(K^s not seem 



1). Here, again, it should be observed that these so-called chitinous pieces of T. rotundum 

 are deeply stained in Ijorax-carmin. 



2). Lang-ley — On the Histology of the Mucous Salivary Glands, and on the Behaviour of 

 their Mucous Constituents. Journ. of Physiology. Vol. X, 1889. p. 433-457. 



3). Raid— Mucin Granules of Myxine. Same Journ. Vol. XIV, 1893. p. 340-34G. 



'I'hese authors state that the granules are not stained in haematoxylin, and that cold 

 suljliuiate causes them to burst. This latter fact seems not to accord with the observations 

 described in the text, in which the granules are always pi'eserved intact. Reid also states that 

 l)oiling water makes the granules break into a mass of stringy debris. Hence we should 

 probably infer that the granules of the glands described in the text and those of the mucous 

 glands of the vertebrates are not exactly of the same chemical constitution. 



