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POPULAR SCIENCE REVIEW. 
Action of Electricity on Noctiluca. — Some very curious experiments, illus- 
trative of the action of electricity on this curious infusorian, have recently 
been made by MM. Robin and Legros. These authorities deny that the 
phosphorescent powers are confined to any particular part of the creature's 
body, and they further allege that when a current of electricity is passed 
into a vessel of water containing noctilucae, all those specimens which lie 
between the poles of the battery are in a state of brilliant phosphorescence ; 
and, further, this condition is increased or diminished according as the circuit 
is complete or arrested. 
The Liguatulce of Serpents. — M. Jacquart has published a memoir, accom- 
panied by illustrations, on the above subject. It is said that he has demon- 
strated the presence of a subcesophagial ganglion, but that he has been 
unable to find a cerebriferous ganglion. M. Jacquart states that the lame 
of Linguatulse are just like those of the Lemeae. 
Development of the Bothriocephalus latus. — Herr Knock, from experiments 
made on various animals, arrives at the conclusion that the embryos of the 
Bothriocephalns latus, introduced directly into the intestinal canal of mam- 
mals, do not make any movements in the organs of these animals. This 
peculiarity causes them to differ from the embryos of tsenias. They also 
pass through all the phases of their development, attaining the scolex stage, 
and afterwards to their sexual development, without going through the inter- 
mediate state of cysticersis. Herr Knock’s experiments establish defi- 
nitively that the embryos of Bothriocephalus latus become developed in the 
intestinal canal only, at all stages of their existence. 
