MARINE BIOLOGICAL STATION AT PORT ERIN. onl 
number of tentaculocysts of 800 specimens, with a view 
of ascertaining the numerical variation. The result was 
as follows :— 
2had 4 tentaculocysts .. 13 had 12 tentaculocysts 
dessin O és Rc che ae als} 5 
BOE, e - Sits LA 5 
ae ,, 8 i Lid a alls) RY 
ass (oO Ae Lt ney 1G bh 
ay), 10 a Teel 8 i 
Oo 3), L1 2 
Twin tentaculocysts occurred in one specimen with a total 
number of 4, in one with 7, in two with 8, in one with 10, 
in one with 11, and a triplet of tentaculocysts in one 
with 16. 
The number of volumes in the library continues to 
increase slowly. Several valuable additions, for which 
our thanks are due, have been made by the executors of 
the late Mr. Robert Okell, and a few have been purchased. 
I have devoted such time as I could spare from more 
pressing work to the preparation of a card catalogue, but 
here again progress is slower than the importance and 
usefulness of such a catalogue demands. 
The Aquarium has again attracted over 15,000 
visitors, and had not the weather been so inclement during 
the months of August and September this number would 
have been largely exceeded, the total at the end of July 
being more than 1,000 in excess of the corresponding 
period of 1907. The tanks have been kept well stocked 
and in excellent condition, but, in the absence of dredging 
and trawling in the deeper waters of the neighbourhood, 
no organisms of special interest have been added. The 
number of copies of the “ Guide to the Aquarium ”’ sold, 
over 830, is not quite so large as that of last year. 
The continued growth of organisms, especially 
Sabella penicillus and Mytilus edulis, in the circulation 
