HELMINTHES GENERIS DUBII. 
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Miescher has been struck by a remarkable striped appearance of the 
muscles of the trunk, extremities, throat, and face, and of those of the 
eye, and also of the diaphragm, in a house-mouse (Ber. liber die Verb, der 
naturf. Ges. in Basel vom Aug. 1840 bis Juli 1842, Bas. 1843, p. 193). 
The muscles of the tongue, larynx, pharynx, and all the involuntary 
muscles, were normal. The stripes were like milk-white threads, which 
were found both on the upper surface as well as in the interior of the 
muscles, and always ran parallel with the fibres; the length of each 
thread corresponded to the length of the muscle ; each individual thread 
represented a cylindrical pouch, becoming narrow at both ends, and 
was filled with granular contents, in external appearance resembling a 
Filaria. The walls of the pouches were composed of a simple structure- 
less membrane ; the contained grains had an oblong, reniform, or sphe- 
rical shape, and a length of 0.0034'" to 0.0054'". They did not resemble 
simple cells, but consisted of a simple membrane, which enclosed a very 
finely granulated substance. Miescher is undecided as to their use ; 
they might either constitute a peculiar diseased condition of an indivi- 
dual muscular fibre, as each pouch may have been engendered under the 
cover of the muscular bundle instead of the fibrillae, or they were pecu- 
liar parasitical formations, which here chose their habitation, and have 
pressed out from the actual muscular substance. Neither is Miescher 
determined whether the parasite be of a vegetable or animal nature ; 
but it puts us in mind of the pouches, observed by Bowmann (Arch. 1841, 
ii. p. 296), in the muscles of an eel, which were filled with Trichina 
spiralis. 
Gluge has discovered an Entozoon in the blood of the heart of a frog 
(Miill. Arch. 1842, p. 148) ; it was very transparent and elongated, 
having a head and tail running to a point, and, on the right side, three 
oblong processes bulged out and in. It did not contain little balls in its 
interior, like the Hcematozoon described by Valentin (v. Mull. Arch. 
1841, p. 435), but was probably a creature allied to it. Hcematozoa 
have also been observed by Remak in the blood of most river fish, and 
almost constantly in the pike (Cannstatt’s Jahresb. 1842 ; Bericht fiber 
die Leistungen im Gebiete der Physiol, im Jahre, 1841, p. 10.) They 
were of different sizes, but all generally twice as large as the blood- 
corpuscles. When in repose, they had an oval or pear-shaped form, and 
they pushed out dentated processes. These processes are the consequence 
of the undulating motions of the transparent membranous part of the 
body. Nearer one end, and more laterally, Remak distinguished a 
thicker oblong untransparent nucleus, from which, usually, foldings of the 
membranous part radiated out to all sides. This membranous portion 
in it ran out into two short tips at the end nearer the solid kernel ; in 
the Hcematozoa of the stickleback, it ran out to a hook-shaped crooked 
thin thread. 
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