832 PROCEEDINGS OF SOCIETIES, 
Feb. 18th, 1875. 
Limnoria terebrans attacking Telegraph Cable, exhibited—Mr. 
A. Andrews showed an example of Limnoria terebrans taken from 
the submarine cable between Ireland and Holyhead. Mr. Sanger 
mentioned that the present was the first instance in Europe of 
this borer attacking a telegraph cable. It was discovered that a 
fault had occurred in the present instance somewhere not far from 
Holyhead, and on taking up the cable it was with difficulty that 
the injury was traced at last to its real perpetrator, which, how- 
ever small ag is a single example, caused eventually a loss to the 
Company of some £10,000. ‘The application of creosote seemed 
to be the only preventive of the depredations of this little crus- 
tacean, whose newly evinced taste for gutta percha seemed hardly 
less than its older and well-known one for timber. 
Solenonema equale, Diesing, exhibited.—Dr. Macalister exhibited 
a specimen of Solenonema equale found by him in the cellular 
tissue behind the bladder in the Anteater, Myomecophaga jubata. 
The same species was described from the same host by Diesing, 
and published by him in his ‘ Revision der Nematoden’ (1861), 
. 709. 
, Gelatinous alge, shown.—Dr. Moore exhibited a sample of gela- 
tinous stuff taken from the ground in a wet moor in Connemara, 
containing a variety of algal forms interspersed with hyphe, pro- 
bably of lichenous origin, well showing how a variety of distinct 
entities sometimes go to make up a stratum at first sight seem- 
ingly swt generis; amongst these were chlorophyllaceous and 
phycochromaceous forms, such as Mesotenium violascens, de Bary, 
on the one hand, and forms of Aphanothece, Nag., and Gloeocapsa, 
others (= Coccochloris, Auct.), in part, on the other. 
Vaginicola-form, unidentified, shown.—Dr. J. Barker showed a 
form of Vaginicola, which appeared to be probably new, the two 
animalcules being seated in a lorica of very globose figure below 
and narrowed upwards, but the necklike portion was still very 
broad,—thus, it was shaped like a hyacinth-glass, with a compara- 
tively short neck. 
Section of Baryta mineral, shown.—Dr. Tichborne exhibited a 
section of baryta mineral, which consisted chiefly of carbonate of 
barium, with a little silica, &c. It bore some superficial resem- 
blance under the microscope to a section of wood. The erystals 
radiated generally from the centre, but were crossed at intervals 
by annular markings, which were opaque and were found on 
analysis to consist of carbonaceous matter ; the section was shown 
as a polariscopic object for the purpose of rendering the rings 
evident. 
Structure of Spine of Parasalenia gratiosa, A. Agass.—Mr. 
Mackintosh presented a transverse section of the spine of Parasa- 
lenia gratiosa, A. Agass. In this the central portion is occupied 
by a reticulation of roundish cells ; from this branch out a number 
