STUDIES OX THE ECTOPAKASITIC TKEMATODES OF JAPAX. 37 



Axine^ Œiiclidophora, é Mie. reticulata — In these forms, there 

 is only one pair of sticky glands. They are situated just in front of 

 the mouth (PI. T, fig. 5 ; I'l. \\V). Their form differs much from that 

 descrihed in Microcjtijle and Octocuiijlc and approaches more that of tlie 

 sticky gland descriljed by me in Diplozoon NippoiiiciunJ^ Tiiey are 

 constituted, namely, by an invaii^ination and transformation of the 

 investing membrane of the body. They are shown in section in fig. 

 o, PL III. As may be seen from it. the cavity of the invagination is 

 lined bv a o-familar mass, which is a direct continuation of the 

 investing membrane. The granules are very simihrr in appearance 

 and in their reaction towards staining fluids to those of the sticky 

 glands of Microcjlijlc. Here, moreover, there is no distinct basement 

 membrane but instead merely a dense layer of connective tissue 

 gradually passing int(j the surrounding mesencliyma. There are in 

 M. reticulata also some muscular fibres that come from the dorsal side 

 of the bodv and terminate in the dense layer oï connective tissue just 

 mentioned (PI. Ill, tig. o). 



Calicûtylô — In this genus, there are two pairs of sticky glands [it 

 the [interior end of the body, the efferent ducts of which are com- 

 pletely separate one from the other, l)ut op.^n very close to each other 

 near the anterior apex of the b:)dy. Each gland is a goblet-shaped, 

 hollow b(3dy situated on the external side of the pharynx, with a long 

 neck (the efferent duct) which proceeds towards the anterior end of 

 tlie bodv. where it opens. One of the pairs has ;i little shorter neck 

 than the other. The goblet-shaped portion has a thick wall consisting 

 of a granular substance, which, in the specimen I have examined, is 

 stained well in borax-carmin ; but as I have been -djle to obtain only 

 a sinii'le soecimen of this o'enus, I can not state whether it is ;dways 

 so or not. The wall of the efferent duct consists of a thick membrane, 



1). Goto— On Diplozoon Xipponicum, n. sp. This Journal, vol. IV, Pt. I, 1890. p. 166. 



