126 
EICHARD ASSHETON. 
It appears to be a distinct jump ; there is a moment when 
neither foot nor tentacles are in contact with the surface over 
which the animal is progressing. It is not quite like the 
looping of a caterpillar ; it is more like the action of the 
boy playing “leap-frog.” 'Phe animal can either bring its 
foot directly forward, or swing it horizontally according to 
space. 
Text-fig. 1. 
.'b 
Tlii'ee successive attitudes of L. saltans during the act of 
jumping, a. Foot. b. Gut. c. Tentacles used in jumping. 
As I have not succeeded in obtaining Loxosoma loxalina 
alive, I cannot say whether it leaps, but from the fact that 
there is the same difference between the oral tentacles and 
the others it seems probable that it does. Salensky’s figure 
suggests that a similar modification also occurs in L. tethyae. 
As far as I know no such agility on the pai’t of a Polyzoan 
has been observed before; Cristatella, of course, is known to 
move, bnt that is motion of a very different kind. It seems 
