PLANARIA. 
590 
13. Planaria fubulata : body oblong, pointed on the 
fore-part, and truncate behind. It is found in great 
plenty among marine confervas in Greenland, and the 
muddy bottoms of holes in rocks which conftantly retain 
water, and proceeds with a ferpentine kind of motion ; 
but, if the probofcis be touched, it contrafls itfelf fud- 
denly into a minute cube. 
14. Planaria quadrangularisx: body pale, ovate, very 
fharp-pointed before, and winged with fmall curled lon¬ 
gitudinal membranes. It ft found in ditches, among 
duck-weed; is very foft, pellucid, of a changeable 
form, and moves like a (lug, leaving a flime on the bodies 
it paffes over; when it meets another animal, it draws 
itfelf in like a fnail. 
15. Planaria bicornis; body oval, lanceolate, obtufe 
at each end, grey cinereous, dotted with black, with two 
very (liort divergent tubes on the fore-part. It is a native 
of thofe waters in Belgium that are covered with duck¬ 
weed; when irritated it fixes itfelf to other bodies, like 
the leech, by means of its tubes. 
16. Planaria grifea: body grey, dilated, elongated and 
pointed on the fore-part; the hind part is abbreviated 
and pointed. It inhabits the waters of lakes, among 
confervas. 
17. Planaria fulva : depreffed, broadifh, and pointed at 
each end, with a long black fpot down the middle. 
18. Planaria viridata : oblong, round, green, and fome¬ 
what pointed at each end. It inhabits wet meadows in 
the autumn. 
II. Eye one. 
19. Planaria glauca : body a little elongated, and cine¬ 
reous, with a white iris. It is about a line long, pointed 
before, and broadifh behind, with 'fometimes a double 
.black line in the middle of the back and meeting at the 
ends. A native of the waters. 
2.0. Planaria lineata: body long, above convex and 
cinereous, with a longitudinal pale line. This fpecies 
is found on the fliores of the Baltic; it is about a line 
and a half long; beneath it is of a pale colour, with a 
brown patch in the middle, tapering before and dilated 
behind. 
21. Planaria rutilans: linear, with a black eye, and 
tapering to a point before. This is found in the Baltic, 
among fhci. 
III. Eyes two. 
22. Planaria fufca : black-brown, with a femi-pellucid 
whitifli fpot above the tail. It is found in low ftreams 
upon and about aquatic plants. When at reft the body 
is circular, and feldom above a line in length ; when in 
motion it is linear, and nearly half an inch long; 
its motion is uniform, fmooth, by gliding along the 
ftream. 
23. Planaria la£lea : body depreffed, oblong; whitifli, 
and truncate on the fore-part. It is found in ponds and 
rivulets, but only in the fumitier feafon, and among 
aquatic plants. When in motion it is about an inch 
long: the body is marked with a white fpot in the 
middle, the purple vifcera elegantly branching round it; 
the margin is white and very tranfparent. 
24. Planaria torva: depreffed, oblong; cinereous; or 
black and whitifli, beneath ; the iris is white, it is lome- 
thing more than half an inch long. 
25. Planaria crenata : depreffed, ovate - oblong, pale, 
with a crenulate margin. A native of Denmark. 
26. Planaria tentaculata : depreffed, oblong, cinereous, 
and tubular on the fore-part. Inhabits ftagnant waters; 
three-quarters of an inch long. 
27. Planaria helluo : body ovate, round, green. It in¬ 
habits wet meadows ; and is not a quarter of an inch long. 
28. Planaria obfcura-. ovate-oblong, white, and obtuie 
at both ends. It is found in ftagnant waters ; and is 
about a line long, and fub-pellucid. 
29. Planaria roftrata: oblong, hyaline; elongated at 
(the extremity ; the eyes are red. It inhabits marlhes; 
about a line long; whitifh, but with a purplilh mm's in the 
middle. 
30. Planaria atomata: flat, membranaceous, marbled 
white and red. It i§* reprefented of the natural flze at 
fig. 5. and magnified at h, where the clufters of black 
dots denote the eyes, which feein to be four rather than 
two ; and, if fo, it ihould be carried to the next fedtion. 
Our figures are from Zoologia Danica. This fpecies is a 
native of the bays of Norway, and refembles the Doris 
oblevata. 
31. Planaria cornuta: flat, rather oblong, with a large 
tentaculum or feeler from each fide of the head. It is 
variegated and veined with yellow and white. The fore¬ 
part exfertile and retraftile like a probofcis. It is repre¬ 
fented of the natural fize at fig. 6. and magnified, in two 
pofitions, at i and k. This alfo inhabits the bays of Nor¬ 
way. 
32. Planaria radiata: oblong, rufous, with a white 
rofe-like fpot on the back. It inhabits wet woods, and 
refembles the Vorticella radiata. 
33. Planaria ftrigata: oblong, pale, with three longi¬ 
tudinal lines. It inhabits wet marlhes; the body is 
marked with rufous ftreaks. 
34. Planaria groffa: cylindrical; white, with black 
eyes ; pointed at both ends. It is found among aquatic 
plants ; it varies in fize; the body is pellucid, with from 
five to more than thirty large fpherical eggs. 
35. Planaria linearis : long, roundilh, and pale-yellow.^ 
It inhabits wet hollows of woods, about a line and a half 
long, and ten times as narrow ; the margin is pellucid and 
white. 
36. Planaria terreftris: linear; above convex, cine¬ 
reous; beneath white. It is found in inoift clumps 
among mofs; it contrails and expands itfelf like a leech, 
and moves like a fnail; body opaque and vifcous. 
37. Planaria tetragona : pale yellow, with four qua¬ 
drangular lamellae. It inhabits clear ftagnant waters'. 
38. Planaria capitata: oblong, cinereous, with a dillinil 
head. Found in the Baltic. 
39. Planaria caudata: body rounded before, and taper¬ 
ing into a tail behind. Inhabits the fliores of Greenland, 
among fea-wrack. It is only two lines long; and, when 
ftrefched out, looks like a cobler’s awl; colour yellowifh- 
rufous. It isfhown magnified at fig. 7. 
40. Planaria auriculata: body oblong, thick in the 
middle, (harp behind ; two feelers like ears in front. It 
is a very minute worm, fcarcely vilible indeed to the 
naked eye ; but is (hown highly magnified at fig. 8. It 
is found in the fea about Norway. 
41. Planaria filaris : linear, with a filiform contradlile 
tail. Found on the Madrepora prolifera. About an inch 
long, and aline broad. Body fleftiy, and reddifli-fulvous, 
obtufe before, and marked behind with a reddifh fpot ; 
the fore-part befet with a very ftiort fiiining fringe. It Is 
reprefented, in a bent pofition, fomewhat magnified, 
with the tail contracted, at fig. 9. and ftretched out, with 
the tail exferted, at L 
42. Planaria lingua : pellucid; brown-cinereous ; very 
obtufe at both ends. Found in the fiih-ponds of Den¬ 
mark in the autumn. 
43. Planaria vittata : body ovate, yellow, the margin 
edged with white, and marked with concentric broken 
lines of black ; in the middle a broad white longitudinal 
line, with a central black one. This is a new fpecies, 
defcribed by Mr. Montagu in the xith vol. of the Linn. 
Tranf. In the front are two auricular appendages, each 
marked with a black patch on the hinder part: at a fmall 
difiance behind the auricles, at the commencement of the 
dorfal white line, are two contiguous patches confiding of 
numerous minute black fpots, appearing perfectly diitinct 
under a lens, and which are probably eyes. The white 
part in the m ddleis fomewhat convex, and feems to be 
what contains the vifcera; the reft is extremely thin. 
Length, when extended, an inch and a half; breadth 
one inch. This extremely-beautiful marine Planaria has 
a flow 
