262 ANIMAL REPRODUCTIONS. 
commonly reputed the eye. He mutilated other 
ten, in various ways, of the fpecies nemoralis. In 
about fix weeks, one, deprived of the horns only, 
had two reproduced, but both wanting the eye. 
Thofe decollated retired into their fhells, and 
could not again be forced to appear. Mr Mur- 
ray’s patience being exhaufted, he broke one of 
the fhells, and faw two points like the rudiments 
of horns already protruded. A fortuitous event 
prevented the continuance of his obfervations. 
From what he had feen, he declared his refolution 
to preferve a middle courfe between thofe who de- 
nied the reproduction of the head, and thofe who 
admitted it. 
Somewhat analogous are the experiments of 
Dr Prefciani of Arezzo in Tufcany, inferted in 
the Giornale di Pifa, 1778. He ends the detail 
of his experiments thus: ‘In my opinion, I have 
‘ been able to afcertain, that the fnails, which had 
‘ loft part of the brain along with the head, died 
‘fooner or later according to the portion taken 
‘away: that the others, which had loft the 
‘ horns, lips, teeth, throat, and tongue, without 
‘the brain being touched, lived as long as they 
‘ could furvive without food. Thofe deprived of 
‘ the horns and integuments of the head have all 
* had perfe&t reproduction.’ M. Adanfon is alfo 
in the lift of experimentalifts, not that he has 
publifhed any writing fpecifically on the fubje&, 
sits but 
