398 
SHELLS. 
[Chap. XI. 
part thereof, so longe as they feele them creepe ; and 
when they hold still, letting it rest in that sort till the 
next daye, they bind it fast and annoynt the hole, and 
the swelling from whence it commeth foorth, with fresh 
butter, and so in ten or twelve dayes, they winde them 
out without any let, in the meanetime they must sit still 
with their legges, for if it should breake, they should not 
without great paine get it out of their legge, as I have 
seen some men doe." 1 
The worm is of a whitish colour, sometimes inclining 
to brown. Its thickness is from a half to two-thirds of 
a line, and its length has sometimes reached to ten or 
twelve feet. Small specimens have been found beneath 
the tunica conjunctiva of the eye ; and one species of the 
same genus of Nematoidea infests the cavity of the eye 
itself. 2 
Planaria. — In the journal already mentioned, Dr. Ke- 
laart has given descriptions of fifteen species of planaria, 
and four of a new genus, instituted by him for the 
reception of those differing from the normal kinds by 
some peculiarities which they exhibit in common. At 
Point Pedro, Mr. Edgar Layard met with one on the 
bark of trees, after heavy rain, which would appear to 
belong to the subgenus geojplana. 3 
Acalephce. — Acalephae 4 are plentiful, so much so, 
indeed, that they occasionally tempt the larger cetacea 
into the Grulf of Manaar. In the calmer months of the 
year, when the sea is glassy, and for hours together 
1 John- Htjtghen Yan Lin- of a light brown above, white un- 
schoten Ms Discours of Voyages derneath; very broad and thin, 
into the Easte and West Indies, and has a peculiarly shaped tail, 
London, 1599, p. 16. half-moon-snaped in fact, like a 
2 Owen's Lectures on the Inver- grocer's cheese knife." 
tebrata, p. 96. 4 Jelly-fish. 
3 "A curious species, which is 
