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— Octolasmis— Heteralepas, and of Lepas — Conchoderma — Ålepas. 
Nothing serves better to elucidate the inadequacy of Gruvel’s 
(1905) family An aspid ae. 1 ) Nothing speaks in favour of dividing 
up the group treated above, it forms a natural group, the family 
Lepadidae sens. str. 
I do not here enter into a discussion of the more or less aber- 
rant genera Chaetolepas, Microlepas, Anelasma, and Koleolepas. The 
Fig. 1. Diagram showing the phylogenetic attinities of Scal pe 11 i d ae, 
and Lepadidae. 
first of these genera in some respects seems to occupy a very 
primitive position, but it has as yet been studied too little to just- 
ify any judgement. The other genera are evidently very much 
transformed or reduced by special biological conditions, and re- 
newed studies are required to settie different questions concerning 
these enigmatic genera and their relationship with the other ped- 
unculated cirripeds. 
x ) Quite apart from the faet that this name is preoccupied for a family of 
the Cumacea. 
