Miscellaneous. 157 



in the middle of the row are separated from the rest by a space 

 double the size of that which is between the other hooks (fi°-s. 9, 



ii 



1 0, 1 1 ) ; and if this is found to be the case in all the species, it is a 

 distinction easy to observe. 



MISCELLANEOUS. 



Notice of a new Species of Cyclemys from the Lao Mountains, in 

 Siam. By Dr. J. E. Gray. 



Cyclemys Mouhotii. 



Shell oblong, pale yellow ; back flattened above, with a dark- 

 edged keel on each side ; the vertebral plates continuously keeled, 

 and rather tubercular in front ; the margin strongly dentated ; nu- 

 chal shield distinct. Lao Mountains. 



This species is most like Cyclemys platynota from Singapore, but 

 the back is much more" decidedly flattened, the flattened part is 

 strongly keeled on each side, and the edge of the shell is strongly 

 toothed both before and behind. This is not merely an individual 

 variety ; for M. Mouhot has sent a considerable series, of different 

 ages, and they all agree in this respect, the younger animals being 

 more decidedly dentated on the margin and more acutely keeled on 

 the back. 



I have named this species after the late M. Mouhot, who has dis- 

 covered and sent to England many new and most interesting animals 

 of different orders. 



On the Transformation of Entozoa. 

 By P. J. Van Beneden. 



The remarks of MM. Pouchet and Verrier, of which a short abstract 

 appeared in our last Number, have called forth from Professor Van 

 Beneden a letter, the chief points of which are as follow : — 



He first states that MM. Pouchet and Verrier are in error in sup- 

 posing that he regarded Coenurus cerebralis as the scolex of Taenia 

 serrata ; he has described the Tape-worm produced by Coenurus as 

 a distinct species, under the name of T. coenurus, and that produced 

 by the Cysticercus pisiformis of the Rabbit as Taenia serrata. He 

 ascribes the doubts of MM. Pouchet and Verrier to their having 

 failed to distinguish these two species of Tape-worms. He does not, 

 however, attempt to explain the main point dwelt upon by the French 



