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5 a hi 
the Mouth in Sucking Crustacea. 23 
Mazille posteriores fere tote contigue, maxillas priores ob- 
volventes, stipite lato fornicato, in foemina latissimo, palpo 
nullo. Male concrete, membranacez, pulvinate, minute 
hamulate, fornicate, in mare marginem interiorem palpo- 
rum pedum maxillarium fulcientes, in foemina orificium 
haustelli post claudentes. : 
Pedes maxillares maxillas tegentes, laminati, cardine maximo 
irregulari, mala nulla, Stipites planiusculi, in foemina ex- 
trorsum dilatate foliacei, in mare contigui, hypostoma 
breviusculum, medio carinatum utrinque explentes. Palp7 
biarticulati, brevissimi, conici, depressi, apice minute ha- 
_ mulati, in mare labia lateralia haustelli formantes. 
Lingua rotundata, mollis, pulvinata, nuda, fissa, lobis intror- 
_ sum arcte contiguis, crasse marginatis, rimam suctoriam 
includentibus. : | 
14, The fulness of the vegetative life in fishes expresses 
itself through the rich variety and size of their external para- 
sites in comparison with the higher vertebrates. Amongst these 
parasites the Cymothoz occupy a prominent place. Their 
stomach (Rathke, /.c. tab. vi. figs. 16 & 176) is so large that 
when distended it almost fills the five last segments of the 
trunk (corresponding to the abdomen in Insects). Its contents 
are by the action of spirit of wine converted into a tough mass, 
which may be cut with a knife, and under the microscope 
shows a plentiful admixture of epithelial cells, in ga some- 
times also of blood-corpuscles. ‘This lump when dried is easily 
taken out whole, particularly in ga, and presents then a per- 
fect cast of the interior of the stomach, in the shape of an oval 
bean, with a shining smooth surface; along the under surface a 
groove is observed, indicating the place where the stomach has 
pressed against the ventral cord of the nervous system ; the 
colour is a light or dark amber, in 4’ga often dark brownish 
red. These animals have of course been well known to the 
cod-fishing inhabitants of the north from time immemorial ; 
and the singular fact just alluded to has given rise to curious 
superstitions amongst the people, and not less curious mistakes 
on the part of the naturalists of former days. Whilst the 
fishermen regarded this ‘stone’ as a powerful talisman, se- 
curing to its possessor, when rightly rise the fulfilment of his 
wishes, the medical men recommended it as an infallible 
remedy against sea-sickness amongst other things ; and whilst 
some naturalists thought that it took the place of the internal 
organs altogether, others thought it to be the ovary, and O. 
Fabricius (Fauna Greenl. p. 250, Oniscus psora) thought that 
it surrounded the intestine. 
