257, 
1914-15.] The Reflexes of A^utotomy in Decapods. 
It was pointed out that the tendons of the short and long extensors 
were inserted on the basal ring of the second limb-segment on either side 
Fig. 25. — Superimposed tracings of contractions of the isolated muscles showing 
difference in latent period. Time secs. P, short extensor ; A, long 
extensor ; F, flexors. 
of a slanting joint (fig. 19). These act in directions shown in fig. 27, and 
therefore tend to pull the jointed parts of the ring in opposite directions, 
Fig. 26. 
Fig. 27. 
Fig. 28. 
These diagrams represent changes produced in the basal parts of the limb 
when the reflex of autotomy occurs. 
as shown in fig. 26. After autotomy it was found that if the joint A, 
fig. 28, were cut, the parts of the ring were actually pulled apart, as shown 
in fig. 26, by the continued contraction of the extensors. Now, if we 
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