126 
CLASS IIl. 
genera, to which may be added Stawrophora Branvpt, form a family 
in the system of EscuscHoutz, to which he has given the name 
Berenicide. ‘This family appears to me to be doubtful, as it does to 
Branpt and others; we must leave the decision to time, I prefer 
to wait the result of new observations, rather than to attribute to 
Acalephs nutrition by superficial absorption. 
For the rest, several genera of Acalephs are founded on figures of 
authors alone—and these sometimes imperfect and faulty. Hence 
no part of Zoology is more uncertain than this. 
Accordingly there are many genera which I have not recorded, 
and possibly more might have been omitted. For here excess of 
timidity is better than dearth of prudence. 
