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REGENERATION IN ARGAS PERSICUS. 
By EDWARD HINDLE, B.A., Ph.D., 
Assistant to the Quick Professor of Biology , 
and NORMAN CUNLIFFE, B.A., 
Student in Medical Entomology. 
{From the Quick Laboratory, Cambridge.) 
(With 4 Text-figures.) 
General Introduction. 
The present investigation was primarily undertaken by Mr G. 
Mer riman at the suggestion of Professor Nuttall, but was discontinued 
at a very early stage owing to Mr Merriman’s departure for Africa. 
The object of the investigation was : 
(1) To determine if immature stages of ticks whose mouth-parts 
have been mutilated or torn off by the forcible removal of the parasite 
from the host possess the power of regeneration. In nature, many 
immature ticks must be injured in this manner, and it seemed of 
interest to determine if they could regenerate the lost parts, thus helping 
them in the struggle for existence. 
(2) To determine if the small legs occasionally observed in nymphal 
and adult ticks are due to mechanical injury followed by regeneration. 
A very striking example of such a tick is the type specimen of 
Amblyomma scaevola Oudemanns (</), in which four legs are markedly 
under-developed. In the lai'ge quantity of tick material that has been 
received at the Quick Laboratory, individuals with one or more miniature 
legs have been observed repeatedly. 
In addition, the subject is one possessing considerable interest from 
a general point of view, as hitherto there have been extremely few 
