him 
eS ae ae ne eee 
LUCERNARIANS OF PORT ERIN. 261 
they were attached to the undersides of stones on the S. 
side of Port Erin Bay, where Depastrum also occurs. 
During the recent vacation I made a most careful search 
in the same locality but failed to find a single specimen. 
On the first occasion in my ignorance of the ‘‘ points” of 
a Lucernarian, | did not observe in the living animal the 
presence of primary tentacles, but in one of the three 
specimens these are now plainly enough to be seen, but in 
the others which are smaller and were not preserved in 
an expanded condition I have been unable to ascertain 
whether these important organs are present or not. Now 
in Haliclystus auricula additional tufts of tentacles seem 
not uncommon, and accordingly, until I have seen more 
specimens I hesitate to conclude that what certainly 
appear to be genuine primary tentacles (retaining the 
original tentacular structure instead of being modified 
into marginal anchors asin H. auricula) are really normal 
structures. 
If on the other hand these primary tentacles are merely 
individual abnormalities, and if I am right in my inter- 
pretation of its internal structure, then this species must 
be relegated to the genus Lucernaria (as at present re- 
stricted). In the approximation of its arms in pairs it 
approaches L. quadricornis, Muller, but its complicated 
gonads differ from those of that species. I at first took 
the Port Erin specimens to be small and somewhat abnor- 
mally shaped L. quadricornis, before I had discovered the 
primary tentacles; they are referred to under this name 
in the L.M.B.C. Annual Report, 1892 (p. 33). I now 
append a description of the species :— 
HALICLYSTUS sp. (? n. sp.) 
Umbrella somewhat conical, passing gradually into the 
stalk without any marked distinction. Sub-umbrella 
cavity very shallow. 
