LINNEAN SOCIETY OF LONDON. 



17 



"When the limbs are all equally bent, tlieir position Avill not 

 suggest running, although it will be a necessary phase in the 

 running. Like certain movements of the horse, that very short 

 period, that transient fraction of a second, which does not suggest 

 running in the crab might be truthfully drawn by any artist, but 

 it would not convey to us the idea of motion, any more than 

 certain of the phases in the movement of a horse would suggest 

 the galloping or the trotting of that animal, although they might 



Fig. 2. 



Inachus dorsettensis. 



be perfectly true. This inelegant phase is apparently so tran- 

 sient that it escapes our observation, and should be omitted by the 

 artist in pictorial representation. I think that the careful preser- 

 vation of some of these forms (such as this particular shore-crab) 

 in these, their true positions of locomotion, may not only be of 

 biological interest as illustrating the mechanism of movement, 

 but to a certain extent may be of use to the artist in enabling 



LINN. SOC. PEOCEEDINGS — SESSION 1893-94. C 



