92 VERMES. 
This animal always ascends the side of its vessel, where it uniformly 
establishes itself in a horizontal silken tube, close to the surface of the 
water. 
It is rare, and it survives readily. Marine. 
’ 
PLATE X. 
Fic. 25. Vermiculus variegatus. 
26. Specimen enlarged. 

Note.—The authors of observations on, the Vermes have devoted 
themselves greatly to the Entozoa, whereof, very few being offered to me, 
I cannot say anything interesting of their nature. But there is one, the 
Ascaris, which, if I mistake not, has been always considered intestinal, 
which occurs frequently in very different situations, as well as in the 
places ascribed to it. 
1.— Ascaris rLustRa.—Plate X. fig. 27. 
Length, half a line ; body slender, nearly cylindrical ; extremities 
acute. Colour, dark grey or brownish, with a darker line in the centre 
of the anterior extremity, denoting an internal organ. Extremities pel- 
lucid. Two very conspicuous black specks, resembling eyes, are seated 
just at the origin of the anterior pellucid part. 
Some of these animals appeared among a number of the decaying 
corpuscula from the Mlustra carbacea, which they frequently penetrated, 
as if in quest of food. 
It may be questioned, perhaps, whether this is truly one of the 
Ascarides. 
PLATE X. 
Fic. 27. Ascaris flustrw, magnified. 
