50 ANNALS OF SCOTTISH NATURAL HISTORY 
Firth, where, in the deep water (30 to 50 fathoms) the species 
is moderately common, being of frequent occurrence among 
the refuse of the trawl net. Plate II. Fig. 4 represents one of 
the Firth of Forth specimens, while Fig. 5 is one of the Moray 
Firth specimens ; respectively 4 and 4 their natural size. In 
the Forth specimen, as shown by the figure, the space between 
the arms is shallow, and the arms are very short. In the 
Moray Firth specimen, on the other hand, the space between 
the arms is deeply concave, and the arms comparatively long. 
I have examined a considerable number of the Moray Firth 
specimens and find that, though the length of the arms and 
the concavity of the space between them varies to some extent, 
none of those examined possessed the short arms, or the 
shallow, and nearly straight, interspaces that distinguished 
the two specimens from the Firth of Forth. 
One of the Forth specimens was obtained a few miles 
east of May Island by a trawler, and is the one represented 
by Fig. 4. The other was obtained by myself from deep 
water some distance west of the May Island, and is now in 
the Museum of Science and Art, Edinburgh. 
III. On Brissopsis lyrifera (Z. Agasszz). 
Ihave on several occasions during the last three years 
obtained specimens of 4rzssopszs lyrifera in the vicinity of May 
Island, Firth of Forth. ‘Though by no means a rare species 
on some parts of the Scotch coasts it does not appear to have 
been known to occur in the Forth estuary or its vicinity pre- 
vious to my discovery of it in 1888. It was first obtained 
about two miles north-westward of the May, and since then 
further specimens have been captured both in the locality 
referred to and also at Trawling Station ix.,a few miles south- 
eastward of that Island. The following records of this species 
from the latter localityare from the “ Eighth and Ninth Annual 
Reports of the Fishery Board for Scotland ”:—6th June 1889, 
three specimens; 17th August 1889, one specimen; 13th May 
1890, one specimen; 5th August 1890, cne specimen. <A few 
others have been ‘obtained this year (1891). In Mr Ware 
Hoyle's “ Revised List of- the British Echinoitdea > ainegiae 
“ Proceedings of the Royal Physical Society of Edinburgh” 
for 1889-90, “ Aberdeenshire and the Moray Fisthi sane 
