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[WoRK FROM THE PORT ERIN BIOLOGICAL STATION. | 
NOTE on LUCKRNARIANS occurring in the neigh- 
bourhood of PORT ERIN, ISLE OF MAN. 
By W. I. Beaumont, 
EMMANUEL COLLEGE, CAMBRIDGE. 
[Read May 12th, 1893.] 
THREE species of this interesting group have been found 
in the neighbourhood of Port Erin; of these, one—Depas- 
trum cyathiforme—is fairly abundant, though apparently 
local in its distribution, and the examination of a number 
of specimens has enabled me to set at rest the divergent 
views which have been held with regard to it. The other 
two species have so far been found very sparingly: one is 
a well known and widely distributed form, the other will, 
I believe, prove to be a new species. The specimens were 
collected and examined while I was working at the 
L.M.B.C. Biological Station at Port Erin in the summer 
of 1892 and again in the spring of 1893. 
Clark, in his Prodromus, (12)* divides the family Lu- 
cernaridz (most of the members of which were originally 
described under the generic name of Lucernaria) into two 
sub-families :— 
1. CLEISTOCARPID, characterised by the development 
of the gonads in “‘genital claustra’”’ (mesogonial pouches 
and gastrogenital pouches of other authors) which are di- 
verticula of the central enteric space or stomach. To this 
sroup belong Depastrum, Craterolophus, Halicyathus. 
2. HLEUTHEROCARPID#, in which mesogonial pouches 
or claustra are absent, the gonads being formed in the 
subumbral or axial wall of the 4 perradial gastral pouches 
*The numbers in brackets refer to the List of Authorities at the end. 
