Chap. XVIIT. CAPTURED PREY. 449 



also studded with papillae ; those in the lower part are 

 spherical and formed of four cells, as in the lower part 

 of the utricle ; those in the upper part are formed of 

 two cells, which are much elongated downwards beneath 

 their points of attachment. These two-celled papillae 

 apparently correspond with the bifid process in the 

 upper part of the bladders of Utricularia. The narrow 

 transverse orifice (o, fig. 29) is situated between the 

 bases of the two spiral arms. JSTo valve could be 

 detected here, nor was any such structure seen by 

 Dr. Warming. The lips of the orifice are armed with 

 many short, thick, sharply pointed, somewhat incurved 

 hairs or teeth. 



The two projecting edges of the spirally wound 

 lamina, forming the arms, are provided with short 

 incurved hairs or teeth, exactly like those on the 

 lips. These project inwards at right angles to the 

 spiral line of junction between the two edges. The 

 inner surface of the lamina supports two-celled, elon- 

 gated papillae, resembling those in the upper part of 

 the neck, but differing slightly from them, according 

 to Warming, in their footstalks being formed by 

 prolongations of large epidermic cells ; whereas the 

 papillae within the neck rest on small cells sunk 

 amidst the larger ones. These spiral arms form a 

 conspicuous difference between the present genus 

 and Utricularia. 



Lastly, there is a bundle of spiral vessels which, 

 running up the lower part of the linear leaf, divides 

 close beneath the utricle. One branch extends up the 

 dorsal and the other up the ventral side of both the 

 utricle and neck. Of these two branches, one enters 

 one spiral arm, and the other branch the other arm. 



The utricles contained much debris or dirty matter, 

 which seemed organic, though no distinct organisms 



