////: h'l-MM.r >, I:\ITM. ORQA$B 87:5 



suspended from tilt; suhlumhar region, \\ln-n- they correspond with tho 

 intestinal convolutions, a little behind tho kidneys. Smo<jth on the surface, 

 tin ,-c organs present, in the middle of their upper face, a deep, and more or 

 I0M oblique fisstrre, resembling the &&M of tho kidney; this gives attach- 

 ment ti> the pavilion of the tube. 



Means of attachment. Tho ovary floats at tho anterior horder of the 

 broad ligament ; it is also sustained by tho vessels which enter it, and by a 

 small cord of uustriped muscular fibres, the ligament of the ovary, which 

 attaches it to the uterus. 



STRUCTURE. Tho organisation of the ovaries comprises a serous mem- 

 li-itiu', a tunica albuginea, proper tissue, and the Graafian vesicles imbedded 

 therein. 



Serous membrane. This is a continuation of tho broad ligaments ; it 

 covers tho whole organ (except at the lulus), adhering closely to the tunica 

 Itmgineo. 



Tunlea nlliiiijinea. This is similar to that enveloping the testicle, being 

 a very resisting fibrous case which sends prolongations into the substance of 

 the ovary. 



1'i-i'jier tissue. The proper tissue, or stroma, of the ovary is more con- 

 nt than that of tho testicle ; it is hard, grates on being cut into, and 

 is greyish-red in colour. It is divisible into two layers, distinguishable by 

 their aspect and structure. 



1. The tnetlnllanj layer, that nearest the hilus, is slightly red and 

 spongy ; it is formed by an interlacing of the connective fibres, unstriped 

 muscular fibres, and a large number of vessels that radiate from the centre 

 towards the periphery. 



2. The cortical layer has the elements of connective tissue for its base ; 

 it is but little vascular, and contains in its substance the Graafian vesicles 

 or follicles (ovisacs), and is consequently often named the ovigenous layer. 

 These ovisacs are in various stages of development ; the smallest are 

 situated beneath tho tunica albugiuea, and gradually increase as they lie 

 deeper. When fully developed, they are filled with a transparent, citron- 

 coloured fluid ; tho ovigenous layer can then no longer contain them, and 

 they protrude more or less from tho surface of tho ovary. 



A <ira(ijlan vesicle, in its perfect state, is composed of an envelope and 

 its contents. The envelope comprises: & fibrous membrane (tunica fibrosa), 

 which is confounded with tho stroma of the ovary, and in it we may re- 

 cognise two layers, the internal of which is rich in vessels ; and an ry</7/ limn, 

 or membrana yianulosa, consisting of round or polygonal granular cells. 

 At tho bottom of the ovisao, this epithelium forms a small mass the mmiilit* 

 },r< <//;/<;".-' or in i-niiniil eminence), in tho contro of which is the oculum or 

 t' tlie mammal. The < jnnr folliculi) are a clear yellow fluid, 



which becomes red on admixture with Mood when tho vesicle ruptures. 



Tho (iiiilinii or m-iim is a coll about l-100th of an inch in diameter, 

 inclosed in the discus proiigenu or rmiiiilnx /</.////*. Tho ovulum is 

 invi >t'-l liy an amorphous, thick cell-membrane {! .V../KJ in-lhieliln (,m m 

 I, nun rili-llinn) ; its granular contents aro name I tin- rlfi-llns or yelk ; and 

 i;> i v.-sicular nucleated) nucleus, designated the >ji-nn!n<il </* /</<. and lying 

 ut a certain point on the zoua pellueida, has in its centre a white patch tho 

 (jerminal .- 



Vesst'l* "n I MfVtt. -The thick, floxnous, arterial divisions arc given on" 

 l.v the uti i'<> i'i-iiri, in ni-f>-ry; they ramify in tho spaces formed \>y (lie tunica 

 before reaching the proper tissue by entering tho hilus. The 



