954 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 
(the 4 camere of Clark). Lucernaria (as now restricted) 
and Haliclystus belong to this sub-family. 
Between the publication of Clark’s Prodromus (12) in 
1863, and of Haeckel’s ‘‘System der Medusen,” 1879 (15) 
there had been found a number of species closely allied to 
the already known Lucernarians but having the stalk in a 
rudimentary condition, and thus forming a link with the 
ordinary free-swimming meduse. For these Haeckel 
founded the family Tesseridee, which with the family Lu- 
cernaridz constitute his order Stauromedusz, the latter 
family coinciding with Clark’s Lucernaride, except that 
Depastrum is removed from it and placed among the 
Tesseridze on account of its supposed relationship to De- 
pastrella, a species of the Tesseridee discovered by him- 
self in the Canary Islands, which unlike the rest of the 
sub-family has a well developed stalk for attachment. 
Now although Depastrwm has some points in common 
with Depastrella, yet im internal structure it differs very 
materially, and I prefer to follow Clark in retaining it 
among the Lucernaride. 
Sub-family—CLEISTOCARPIDA. 
Depastrum cyathiforme, (Sayrs.) 
This species was discovered last year by myself and Mr. 
Gamble on the 8. side of Port Erin Bay. I found it again 
during the recent vacation in the same locality, and also 
on the limestone rocks at Poyllvaaish. It is fairly abund- 
ant in both localities, attached to the under surface of 
stones, being apparently most plentiful above the Lamin- 
arian zone, though occurring in that zone also more 
sparingly, but according to my experience of larger size. 
It is very firmly attached, and I doubt whether it ever 
moves from the spot where it first attaches itself; I 
have never seen a detached specimen re-attach itself, in- 
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