SECT. 203.] THE APPENDAGE OF THE OVARY. 453 



<rll, and measuring o'oi" in diameter. The contents of this 

 nucleus are pellucid, and it has a homogeneous, round, parietal 

 nucleolus, measuring o - oo3'" in diameter. The nucleus is termed 

 the germinal vesicle, vesicula germinativa (the 'vesicle of Pur- 

 kinje'), and the nucleolus has the name of the germinal spot, 

 macula germinativa (or the ' spot of Wagner'). 



The appendage to the ovary, or par-ovarium (Nebeneierstock), is 

 a rudiment of the Wolffian body of the embryo, and consists of a 

 certain number of canals, o - i5'" to o"2'" in diameter, diverging 

 from the hilus of the ovary, and passing into the broad ligament 

 of the uterus. In the human subject, these canals do not open 

 into the ovary, nor are they connected with any other parts, and 

 they contain nothing but a small quantity of clear fluid. They 

 consist of a fibrous coat, o'02o'" to o - 024'" in thickness, lined by a 

 simple layer of pale cylindrical cells, probably provided with cilia; 

 they are of interest only as being the remains of an embryonic 

 structure. 



The arteries of the ovary are derived from the spermatic and 

 uterine arteries, and pass upwards into the ovary between the two 

 laminae of the broad ligament. They appear as numerous small 

 trunks, which run onwards, in a tortuous manner, in the internal 

 parts of the stroma, and terminate, partly in the stroma itself, and 

 partly in the tunica albuginea. They are more especially distri- 

 buted in the walls of the Graafian follicles, where they form an 

 outer, coarser network, and an inner one with finer meshes ; and 

 this reaches as far as the membrana granulosa. — The veins arise 

 at the same places, being, in the human ovary, generally very dis- 

 tinctly visible in the Avails of the lai'ger follicles, and terminate in 

 the uterine and internal spermatic veins. — Some lymphatic trunks 

 pass out at the hilus of the ovary, and proceed with the blood- 

 vessels to the lumbar and pelvic glands. With regard to the 



•■as, they arise from the spermatic plexus, enter the ovary, with 

 the arteries, as small trunklets, with fine nerve tubules and ' fibres 

 of Remak,' but they have not yet been investigated with regard to 

 their ultimate distribution. 



My opinion, that the canals of the parovarium have cilia on their epithe- 

 lium, was oased {Micros. Anat., ii. z, p. 446) on the observation of cilia in 

 ts of the broad ligament. Becker, however, now confirms this view by 

 direct observation. In certain cysts, which were present in large numbers on 

 the ovary of a mare, this author also found ciliated epithelium. In the ova 

 of the rabbit, Remak has noticed a fine radiating striated structure in the 

 zona pellucida, which is probably to be ascribed to minute pore-canals. 



