346 Mr. B. B. Woodward on Pisidium supinum and 
Abdomen shining, the two basal segments smooth, the apical 
segments sparsely punctured. 
Hab. Charles Island, Galapagos (C. Darwin). 
This was taken by Charles Darwin on the voyage of the 
‘Beagle, but has remained undescribed. It is much more 
nearly allied to the two species described by Dr. Brauns 
from Costa Rica than to those from the lower Amazon. 
From NV. schmidti it differs in the proportionate distance 
between the posterior ocelli and the eyes, the ocelli being as 
far from the eyes as from each other in schmidti, From 
costaricensis it differs in the sculpture of the median segment, 
and from both in details of colour. 
XLIT.—Pisidium supinum, A. Schmidt, ae P. parvulum, 
Clessin, fossil in Ireland. By B. B. Woopwarp, F.L.S.. 
&e. 
In the ‘Irish Naturalist’ for July (pp. 101-105), Mr. R. A. 
Phillips places on record the occurrence of Pisidium supinum 
and P. parvulum in some sandy deposits in Ireland. His 
material, with customary courtesy, he has placed at my 
disposal for examination, and I have great pleasure in 
cordially congratulating him and his coadjutor, Mr. A. W. 
Stelfox, in having added these species to the Irish Molluscan 
fauna, and, in the latter case, to the British as well. 
At the same time some statements in My. Phillips’s paper 
and some of the results claimed cannot be passed without 
challenge. 
The pair of valves submitted as P. parvulum from the 
Suir, near Clonmel, and two of the three valves from the 
Shannon at Plassy, near Limerick, belong undoubtedly to 
that species. The odd larger valve from the Shannon is 
manifestly not the same, and through rolling has so com- 
pletely lost its hinge-characters that it is impossible to place 
it with any certainty, although not improbably it is a young 
example of P. lilljeborgu. Judging from the state of preser- 
vation of the shells, living examples may yet be found in 
these two localities. Of the thirteen valves sent as P. par- 
vulum from the Suir, near Fiddown, five are referable to that 
species, the remainder, judged even by Mr. Phillips’s own 
criteria, are young P. supinum. Three out of a score of 
valves from the Barrow, near New Ross, are also passable as 
