414 



THE MAIN SOLE OF DRACONEMA 



X200 



Junint 



sfflrac.... 



set irar 



fh tst asrsoa 



Fig. 1. Male Dra- 

 conema cephalatum, 

 showing the two soles 

 armed with ambula- 

 tory setae. One of 

 the setae is shown 

 below more highly 

 quirt magnified, set amb. 

 The labial sole is very 

 much the smaller. 



rnt 



dm 



sir rm 



sd<jilil6! s>1 naib 



him in A glance at Fig. 1 will enable the reader 

 at once to understand the posterior "sole" 

 of Draconema cephalatum. It is of con- 

 siderable extent, occupying most of the 

 posterior fifth of the ventral surface of the 

 body, and is characterized by very obvious, 

 longitudinal groups of curved ventrad 

 setae. 



The much smaller anterior sole is very 

 near the front of the head on the dorsal 



mill f side, and is characterized by setae, smaller 

 than, but similar to, those of the other 

 sole. 



The main sole. Favorably stained speci- 

 mens exhibit the structure of the am- 



S1 //, bulatory adhesion tubes, as well as of the 

 associated multicellular ventral glands ar- 

 ranged in a long ventral group opposite to 

 and a little in front of the major sole. 

 Each adhesion tube connects, at its base, 

 with a duct that leads to a separate gland. 

 The anterior pair may be taken as typical 

 of any group-member of this compact 

 f composite series of glands (see Figs. 1 and 

 ; 2) . This anterior pair is sometimes more 

 distinctly separated from the general mass 

 of the glands than are any of the subsequent 



