448 



GENLISEA OKNATA. 



CHAP. XVIIL 



These papillae extend a little way up the dorsal and 

 ventral surfaces of the utricle ; and a few, according to 

 Warming, may be found in the upper part. This 

 upper region is covered by many transverse rows, one 

 above the other, of short, closely approximate hairs, 

 pointing downwards. These hairs have broad bases, 



and their tips are formed 

 by a separate cell. They 

 are absent in the lower part 

 of the utricle where the pa- 

 pillre abound. The neck 

 is likewise lined throughout 

 its whole length with trans- 

 verse rows of long, thin, 

 transparent hairs, having 

 broad bulbous (fig. 30) bases, 

 with similarly constructed 

 sharp points. They arise 

 from little projecting ridges, 

 formed of rectangular epi- 

 dermic cells. The hairs 

 vary a little in length, 

 but their points generally 

 extend down to the row 

 next below ; so that if the 

 neck is split open and laid 

 flat, the inner surface re- 



rio. 30. 



isea orr>ata.} sembles a paper of pins, 



portion of inside of neck leading the hairs representing the 



nto '.he utricle, greatly enlarged, show- _ * 



ing the downward pointed bristles, pins, and the little transverse 



L(] small quadrifid ct lls or processes. * 



ridges representing the folds 

 of paper through which the 



pins are thrust. These rows of hairs are indicated 

 in the previous figure (29) by numerous transverse 

 lines crossing the neck. The inside of the neck in 



