20 M E D 
beneath fulvous, with innumerable curved fibres; tuber¬ 
cles bluifh-white, ending in two items, terminated by a 
pellucid wbitifh membrane, which is flaccid and blue or 
white at the tip. This alto is found in the Tufcan lea. 
27. Medufa utriculusj bottle-fltaped, with a very long 
granular central tentaculuni beneath ; margin with nume¬ 
rous blue tentacula tip' with white. Inhabits the ocean; 
is hyaline, with about thirty marginal cirri. 
2.8. Medufa caravella : body ovate, with very long cen¬ 
tral tentacula beneath, and a crenulate veil above. It is 
found in the Atlantic, and inflames the hand by its toqch. 
The body is thin, fniooth, (hilling, bluirtt, hyaline, and 
tapering on each fide. The crelt runs through the whole 
length of the back; it is femi-lunar, compreffed, fur¬ 
rowed with branched grooves, and marked with rofy 
veins ; tentacula jointed, blue, fragile, and intermixed with 
Ihorter tubercles. 
29. Medufa utnbella : tentacula of the difk naked, of 
the margin glandular; margin membranaceous, crenate. 
The body is rigid, deprefled, with radiate grooves above ; 
beneath with a clavate trunk in the middle, furrounded 
with fhort clavate tubes; tentacula jointed with three 
rows of glands. Inhabits the Mediterranean and Indian 
feas. 
30. Medufa dimorpha : back eminent; beneath a mi¬ 
nute crofs furrounded with five apertures ; the margin is 
ciliate. The body, when expanded, is orbiculiar, with a 
fejuare infle&ed margin ; beneath it is concave ; the back 
is divided into four parts by radiate grooves, with an ele¬ 
vated central crofs and white fibres. It is found in the 
North feas. 
31. Medufa campanula : difk gibbous ; the border wide 
and ciliate; beneath is a hairy crofs. The body is conic- 
orbicular, beneath hollow and fnowy ; the fringe of the 
margin and crofs yellow ; the latter is often white. In¬ 
habits the Greenland feas. 
32. Medufa digitata : hyaline, with a piftil beneath in 
the centre; margin ciliate. It leaps with its margin bent 
in. Body very minute, conic, Itriate ; fringe yellow or 
white, and hooked within ; piftil ending in a yellow or 
white pencil. Inhabits as the laft. 
33. Medufa frondofa: margin of the difk varied with 
white opaque fpots; it has eight tentacula, is dichoto¬ 
mous, and is befet with white pedunculate warts termi¬ 
nating in tufts. It is fmall; and found in the Archipe¬ 
lago. The body is flattifh, a little convex above ; the 
border is membranaceous, and fringed with white fafei- 
culi; beneath is a villous nucleus, which in the fmaller 
ones is eight-angled, and in the larger ones ten-angled. 
34.. Medufa tetraftyla: hemifpherical, without tenta¬ 
cula; furnifhed with four marginal tubes united into a 
prifm. It is found in the Red Sea ; and is about a fpan 
and a half acrofs. Body hyaline, rather rigid ; the tubes 
of the margin are linear, three inches long, ftraight, and 
fiat. 
35. Medufa ofloftyla: hemifpherical, without marginal 
tentacula ; beneath is a four-folded column, with eight 
many-cleft lobes at the tip, and fixteen lateral appendages. 
The body is of a bluilh-hyaline, and is a full foot in dia¬ 
meter; the column beneath is about an inch and a half 
long. Inhabits the Red Sea. 
36. Medufa andromeda : hemifpherical, without mar¬ 
ginal arms ; beneath there are eight round ramified folia- 
ceous arms. The body is tranfparent, of a pale yellowilh- 
brown or bluifh-colour, with white rays and an entire 
margin; in the middle is a fmall black crofs; the arms 
are white, and a little thicker than a goofe-quiil at the in- 
fertion. Inhabits as above. 
37. Medufa corona: hemifpherical, without marginal 
tentacula ; beneath there are eight cultrate arms, toothed 
each fide below. Body reddifh-hyaline ; it is about four 
inches acrofs, with a blue crofs in the middle ; the arms 
beneath are broad, and two-lobed at the tip. This alfo 
inhabits the Red Sea. 
38. Medufa perfeje; hemifpherical, hyaline, with an 
USA. 
opaque white ring within, four times interrupted ; there 
are no marginal tentacula. The body is about two inches 
wide, with a very prominent margin ; it has four arms, 
fub-lanceolate, about an inch long, and undulate at the 
margin. Inhabits the Mediterranean, 
39. Medufa cephea : hemifpherical, tuberculate, red-, 
difh-brown ; beneath are eight arms villous at' their ex¬ 
tremities, and nine long filiform tentacula. The body is 
pellucid, with eight paler rays ; arms bluifh, with black 
extremities; the tentacula are pointed. Inhabits the 
Red Sea. 
40. Medufa probofcidalis: hemifpherical, with a long- 
probofeis in the middle beneath, and fix marginal tenta¬ 
cula. The body is hyaline, two inches and a half broad, 
with a prominent equal margin; probofeis fiib-flexile, 
and truncate at the tip, with a fringed folded verlatile 
membrane. Inhabits the Mediterranean. 
41. Medufa mollicina: deprefled, with twelve lateral 
apertures and tentacula. The body is about an inch and 
a half in diameter, hyaline; the margin is prominent, 
with twelve plaits. Inhabits the Mediterranean. 
42. Medufa pileata : ovate-campanulate, with a hyaline 
globe above; within is an oblong red nucleus; the mar¬ 
gin has numerous tentacula that are yellow at the bafe. 
The body is an inch and a half high ; the margin a little 
contracted. Inhabits the Mediterranean. 
43. Medufa crucigera : hemifpherical, with a reddifh 
crofs as wide as the body ; the body is fmall, with four 
very minute white approximate rings above ; the margin 
is thin, prominent, varioufly flexile, and often reddifh ; 
the tentacula are numerous, but not fo long as the body is 
wide. 
44. Medufa unguiculata : orbiculate; above flat, with 
fixteen rays; the margin is crenate, with fixteen (lightly- 
incurved fangs. The body is diaphanous, bluifh, and 
fpotted. It is found about the (bores of Jamaica, and is 
the fize of a nutmeg. 
45. Medufa pellucer.s. This, the largeft and mod 
fplendid of the luminous medufas, was difeovered by 
fir Jofeph Banks, in the firft voyage of captain Cook. It 
was taken up from the fea in the paflage from Madeira to 
Rio Janeiro. This fpecies meafures fix inches acrofs the 
crown or umbrella, which is marked by a number of 
opaque lines that pafs off from the centre to the circum¬ 
ference. The edge of the umbrella is divided into a num¬ 
ber of lobules, which fucceed each other, one large and 
two fmall ones alternately. From within the margin of the 
umbrella there isfufpended a number of long cord fhaped 
tentacula. The central part of the animal is opaque, and 
furnifties four thick irregularly-ftiaped proceffes, which 
hang down in the midft of the tentacula. It throws out 
flafhes of light during its contractions, which are fo vivid 
as to affeCt the fight of the beholders. When the water 
in which thefe animals were contained was emptied out 
of a bucket, it appeared like a ftream of fire, or fufed gold. 
Phil. Tranf. 1810. part ii. 
46. Medufa Spallanzani : convex, with a fimbriated 
margin. There are four thick tentacula, and eight which 
are long, (lender, and hollow. In the concavity of the 
umbrella there are four fmall groups of long thin bodies, 
entwined together like inteftines, and adhering to an en¬ 
tangled mafs of fmall tubes of a filver colour, that are ex¬ 
tremely tranfparent and elaftic. At the internal edge of 
the cavity of the umbrella there is a thin mufcular lamina. 
The purfe communicates with four lateral orifices, and 
has an aperture befides. Spallanzani difeovered this fpe¬ 
cies in the Strait of Medina : he reprefents it as being ex¬ 
ceedingly luminous: he fays it fhines like a torch, and is 
vifible thirty-five feet below the furface of the water. 
The light is variable ; fometimes it continues for a quarter 
or half an hour, or longer ; at others it becomes fuddenly 
extincf, and re-appears after a confiderable interval. He 
fuppofes that the ceflation of the light depends upon the 
animal being at perfeCt red. Mem. della Soc. Ital. tom. vii„ 
47. Medufa pyrefoma : body elongated, and nearly cy¬ 
lindrical; 
