APPENDLX, 230) 
would turn inside out the finger of a glove. This 
oneness of cell and polype is a distinctive character 
of the group. Another is the higher organization of 
the internal parts. The mouth, surrounded by ten- 
tacles, leads by gullet and gizzard through a channel 
into a digesting stomach, from which the rejectable 
matter passes upwards through an intestinal canal 
till it is discharged near the mouth. The tentacles 
also differ much from those of true Polypes. Instead 
of being fleshy and contractile, they are rather stiff, 
resembling spun glass, set on the sides with vibrating 
cilia, which by their motion up one side and down 
the other of each tentacle, produce a current which 
impels their living food into the mouth. When these 
tentacles are withdrawn, they are gathered up in a 
bundle, like the stays of an umbrella. Our Plate I. 
contains the following examples of Polyzoa. 
VALKERIA cuscuTa. 1. I. fig. 3. 
From a group in one of Mr. Lloyd’s vases. Fig. 
3a is the natural size of the central group of 
cells, in a specimen coiled round a thread-like weed. 
