113 



the fully formed larva is that shown in PI. XV, Fig. 4, with onlv two 

 arms, the postoral ones, which are fairly long, about body length. There 

 is, however, a considerable variability in the larval shape; another pair 

 of arms, the posterodorsal ones, may develop, but sometimes only one of 

 these arms is formed. Also the arms may coalesce to a various extent. 



Fig. 47. Various forms of the larva of Peronclla Lestieuri. '™/i- Only in one of them the 

 young spines are drawn; all the s|)ecimens figured were at about the same stage of develop- 

 ment. Drawn from life. 



Thus the variation as regards the larval shape is rather |)hantastic. as seen 

 from the sketches represented in iigure 47. And these larva* could not be 

 designated as abnormal, since the metamorphosis was completed by all 

 of them, even by llie one with no aims at all. .\lso amoiii* the larvae reared 

 by Tennent corresponding variations occurred, even a specimen with 

 five arms, which I have not observed. On account of the rudimentary 

 character of the larva these variations are not very surprising; possibly 



10 



