66 
ration oaune a looping of the cornua irt&ri and tubas, The vagina 
and the utsruo increase greatly in diaaeiar in later stacec, and 
the forsor opens straight posteriorly into the dorsal corridor of 
the vestibule. 
In mleo tho ostium degenerate* and leave.: only the Jiydatid of 
SftOrgii-nl, which is no* always present, oven up to £0.0 on. itagea* and 
the duct itself degereraiec completely in the tubar and co~nua uteri 
regions. In all th? stages studied, a r^sami of the corpus uteri is 
found as ^ vesicle, blind both anteriorly an* posteriorly, at the 
junction of *fe» genital cords, or a~. a solid stri in the region wh- j r« 
corpus and o rvix uteri would be in a forale. The vagina rascalina 
is prsoent in stag s studied, but hug degen rated to a vesicle filled 
with epithelium, dorsal to the openings of the olffian ducts into 
the sinus, by the £6.0 O*. rta?o. 
In frce-mrtinc d generation of the ^llerian ducts gees on as 
in the sale, but it hae started later, a^tar the duct h*d attained a 
more advanced state than in the norm! sale, and, w? il degeneration 
seems to h&v# been proceeding sore or css uniformly throughout the 
duct length, it disappears first n ar the anterior end, in the tubar 
region, and la t, whf»ro the utertm and vagina wo** Id bo. Here again 
the two 9.0 crs. free-martins show e variation in th-> condition of 
these ducts, correlated with that of the gonad and *©lffian ducts, 
which points to a difference in time of onset of the wale herraon?, and 
consequent 1 n&er tine of degeneration in Ho. 2, acting on a less ad- 
vanoed stag* of female differentiation, an oonpared with to. 1, with 
later onset and rhorter duration, acting on a ranch core advanced 
stage of female development. In the oldest freo-^artin no hydatid 
i* fo* nd 03 in com ml?s. The other three present a series in do- 
generation of he duct derivatives as in males, except that the onset 
of degenerafct on ha occurred at various stages, and therefore has 
reached various stages, ^Ivayo cosparst-ls to tf^ose of younger miss. 
(8) In both sexes, and In the free-nartin, the state of do- 
