194 



SPOLIA ZEYLANIOA. 



branching, repeated in the sub-branches, the whole forming a 

 sort of brush," and he has proposed that examples showing 

 this character should be considered as a variety under the 

 name " 'plumulosus." I have previously {loc. cit., pp. 355, 

 357, and 359) recorded a similar modification in Canthocalanus 

 pauper, Undinula caroli, and Acrocalanus longicornis. 



Numerous specimens, both of the above species and of 

 Undinula vulgaris, showed this pecidiarity, and a study of 

 these examples has caused me to alter my opinion. I am 

 inclined to regard this branching of the setae merely as an 

 abnormality and not a true variety. In the tables below I 

 have given the results obtained from an examination of the 

 f ureal setse of a series of individuals of these two species, in 

 which this peculiarity was present to a greater or less degree ; 

 in all cases the seta showing the modification is indicated by +. 



Canthocalanus pauper. 



Number of 

 times each i p. 

 seta ia ^O 



affected 



10 12 16 



14 13 



