230 
NATURAL HISTORY 
N°. xi. Water-mint of a fpicey fmell, Mentha arveiifis verticillata 
folio rotundiore odore aromatico \ a fcarce plant gathered in St. Be- 
rian under a hedge, 1754. 
N°. x. Roman nettle, Urtica pint if era femme mag?io Uni , feu 
Urtica Romana \ gathered in a ftiady ditch at Velinvran, Augult 
4, 1754- 
N°. xi. Sheep’s forrel, Lapathum acetofum , repens , lanceolatum \ 
gathered on the north fide of St. Michael’s Mount 1754. 
N°. XII. Hairy kidney wort, Cotyledo?i hirfuta , at Caftle Tre- 
ryn in the parifh of St. Levin. 
sect. vi. N°. xiil. The firft I fhall mention of this fort, is the Ros folis , 
d Drofera , or Rorella , in Englifh the Sun-dew, from a fpeck of 
aquatic 3 water which refts in the middle of the leaf, even in the dryeft day. 
plants. In (7; ornW all we call this herb the IJles ; for what reafon I know 
not. It is lo very fatal to our Iheep, that they pine and die in every 
pafture where this plant abounds. Mr. Ray c was not ignorant of 
the hurtful effects of this herb : he obferves, that it is of a fiery 
burning nature, and that the leaf, applied to the Ikin, railes an 
ulcer ; that it is accounted hurtful to the Iheep, and by the farmers 
fometimes called the Red-rot. This pernicious quality is not owing 
to the nature of the herb, but to an infed or worm, which, feed- 
ing on this herb, lays its eggs on the leaf, and fixes them therein by 
lbme noxious poifonous gum : the eggs are fwallowed with the 
flowers and leaf, and eluding the menfirua of the ftomach, get 
into the chyle and blood ; they are detained in the capillary veflels 
of the liver, where, meeting with the requifite degree of heat and 
moifture they fecundate, the animalcules grow , and there make 
holes in which feveral of them lodge together, and feed upon the 
liver till it can no longer perform the fundions of its ftation, and 
the Iheep dies. Two of thefe infeds in natural fize are given Pi. xxiv. 
Fig. x. a and b . The pregnant eggs of worms are taken in with food 
by children, and fometimes adult perfons ; and efcaping the tritu- 
ration of the ftomach, lodge in fuch parts and hatch, where the 
warmth and juices are favourable to the ripening, excluding, and 
perfeding the fcetus . Many forts of fifh alfo are fubjed to worms and 
animalcules : the mackrel has fome frequently in its liver, fo has 
the cod, elpecially if it has a bad habit ; and the hake is very fub- 
jed to worms in moft parts of the flefh. 
d Dr. Francis Nicholls M. R. F. R, S. fays, 
z I b j d - P a ge 54- 
a Ibid, page 56. 
b Ibid, page 213. 
* Ibid, page 227. 
that bullocks, as well as Iheep, <c are fubjeci to a 
fmall flat worm, and often many of them refem- 
bling a foie, by the butchers termed Hooks : this 
worm always builds a wall of Hone for its defence, 
which is ramified like a Gall dudt.” Phil. Tranf. 
xxxix. for 1756, page 26. 
Phil. Tranf. 
The 
