M Y T 
4 07 
lour, with violet fpots at the fnles; beaks rounded, di¬ 
lated. Inhabits the feai of Magellan. Shines like mo¬ 
ther-of-pearl. 
49. Mytilusazureus: Ihell gibbous, azure, with yellowifh 
llripes beneath; beaks obtufe. Shell about an inch broad 
and three quarters long, narrowed at the lower margin.. 
50. Mytilus murinus : Ihell moufe-colour, with violet 
fpots, and a broad rounded roly margin ; beaks pointed, 
Itraight. Inhabits Guinea. 
51. Mytilus teftaceus : fliell long narrow, covered with 
a teftaceous Ikin, under which it is (hining lilvery, varied 
with blue, red, yellow, and brown. Refembles M. mo¬ 
diolus ; but is larger, and far more beautiful. 
5a. Mytilus virgatus : Ihell dilated outwardly, greenifli- 
yellow with rofy ltripes ; beaks obtufe, curved. 
53. Mytilus cordatus : Ihell oblong-, very thin ; white, 
with obfolete ftrias, with a heart-Ihaped gape behind. In¬ 
habits the Indian and Southern Ocean ; adhering to co¬ 
rals and marine fubltance§. 
54. Mytilus flagnalis : fliell oval, flattilh, and tranf- 
verfely ribbed. Found in the Lake Sch.wanfea: refembles 
M. cygneus; but is as much as eight inches broad and 
four and a half long, and is lefs convex ; fliell greenifli, 
with darker rays, and yellowifli-brown at the margin. 
55. Mytilus zellenfis: fliell oval convex, greenifti-yel- 
low ; rounded behind, elongated and obtulely pointed 
before; beaks obfolete. Inhabits Itagnant waters of 
Germany ; refembles M. cygneus, but is feven inches 
broad and three long. 
56. Mytilus rofeus : fliell fuborbicular, with fifteen 
triangular crefted grooves, and alternate triangular 
teeth. Inhabits Africa. Shell rofy, within white, pur¬ 
ple at the margin; three inches broad, and a little fliorter. 
Probably not of this genus. 
57. Mytilus puniceus : fliell gibbous, pointed, with 
fifteen grooves : margin toothed. Inhabits Africa. Shell 
fourteen lines long and about half as broad ; under the 
fulvous Ikin violet or fcarlet, fometimes mixed with brown 
and green. 
58. Mytilus niger: fliell flat, thin, with very fine 
grooves, covered with a black Ikin, under which it is 
milky and finely polilhed. Inhabits Africa. About an 
inch and a half long. 
59. Mytilus laevigatus: fliell flat, fmootli, covered with 
a thick fulvous Ikin, under which it is rofy. Inhabits 
Africa. Two inches and a half long, and about half as 
wide. 
60. Mytilus dubius: fliell tranfverfely wrinkled, ob¬ 
tufe at each end, fulvous, within margaritaceous ; beaks 
obfolete; hinge without teeth. Inhabits frefli waters of 
Senegal; five inches broad, two long. 
61. Mytilus polymorphus : fliell five-celled ; valves ca¬ 
rinate, and flattilh on the incumbent fide ; beaks obtufe, 
and inflefted backwards. Inhabits the Ruffian fea; about 
the fize of a plumb-ftone ; and is found in frefli waters 
four times as large : adheres in mafles to ftones and ma¬ 
rine fubftances. 
M Y X 
6a. Mytilus caniculatus: fliell fmoothilh, cbefnut- 
brown, within parti-coloured ; focket of the hinge cani- 
culate. Inhabits New Zealand. 
63. Mytilus roftruin : fliell oblong, thin, greenifli, 
truncate ; beaks fliarp and carinate ; valves gaping at the 
end. Inhabits Amboyna. Whitilh wfitii a calf of green ; 
upper-ends very fliarp, forming a prominent keel; valves 
exactly fimilar, but open at each extremity. 
64. Mytilus camellii : fliell oblong, thin', greenifli, 
truncate; beaks fliarp and carinate; valves completely 
clofed. Inhabits Japan ; and refembles the laft, except 
in having the valves exactly clofed. 
65. Mytilus membranaceus: Ihell fubrhombic, very 
brittle, the anterior margin angulated; it is fubdiapha- 
nous, fomewhat convex, almoft membranaceous ; pearly 
within, and very fmootli, delicately itriated; greenifli with¬ 
out, the margin very Itraight to the hinge, which is tooth- 
lefs. See fig. 9, 10. This has been called membranaceus 
on account of its extremely thin and flender texture, 
which forms its mod obvious c ha rafter. It is one inch, 
long and broad. The contour approaches fo nearly to 
that of Mya variabilis in its perfeft ftate, (fee p. 429.) as 
to make it delirable that they fliould both be placed in the 
fame genus, did not the hinges fo materially differ. In 
faff, many of the Myte and Mytili belong to one natural 
family ; and there is often much difficulty in determining 
under which name a particular fpecies ought to be placed ; 
for Linnaeus has not made the abfence of teeth an indif- 
penfable charafter for a Mytilus, and fome of that genus 
gape like the Mya; at one extremity. Dr. Maton in Linn. 
Tran/', vol. x. 
MY'TIS, f. A name ufed by fome writers to exprefs 
the black juice found in the mouth of the Sepia, or cut- 
tle-fifh. 
MY'TON, a village in the north riding of Yorklhire, 
between Boroughbridge and Ten-Mile-Hill. Here the 
Swale river leaps into the Ure, as it were from a precipice. 
MYU'RUS, J. [Greek.] With phyficians, denotes a 
pulfe which is continually weakened by infenfible degrees, 
fo that the fecond beat is fainter than the firft, the third 
than the fecond, &c. The word is compounded of 
nioufe, and ovpa, tail; the diminution of the pulfe being 
fuppofed like that of the thicknefs of the tail of that ani¬ 
mal, which grows lefs from the root to the tip. 
MY'US, in ancient geography, a town of Ionia, on 
the confines of Caria, founded by a Grecian colony. It 
was one of the twelve capital cities of Ionia, fituate at 
the diftance of about thirty Itadia from the mouth of the 
Maeander. Artaxerxes, king of Pferfia, gave it to The- 
miltocles to maintain him in meat. Magneiia was to fup- 
port him in bread ; and Lampfacus in wine. C. Nep. in 
ThemiJ'. 
MYX'A, / [Greek.] The mucous difcharge from the 
npfe. The wick of a candle. The febeften, or Aflyrian 
plum. See Cordia myxa, vol. v. p. 196. 
MYX'INE. See Gastrobranchus, vol. viii. p. 271, 
6 L N. 
Vol. XVI. No. 1130. 
