326 STUDIES ON PATHOLOGIC OVA. 



DESCRIPTIONS OF PLATES. 

 PLATE 21. 



FIG. 242. Isolated villi from No. 1878, shown in figures 232 and 233, plate 19, Chapter XIII. X4.5. 



FIGS. 243-244. Appearance of villi in section, same specimen. X7.5. 



FIG. 245. Cross-section view of an entire normal vesicle with cyema and adnexa. No. 2053. X3. 



FIG. 246. Section of villi from same. X36. 



FIG. 247. External appearance of conceptus, showing filiform villi. No. 866. XI. 5. 



Fio. 248. External appearance of conceptus, showing presence of hydatiform villi. No. 2108. X2.25. 



FIG. 249. Sparsely villous area from No. 1892. Xl.5. 



FIG. 250. Isolated villi from same specimen, showing maceration changes. X3. 



FIG. 251. Isolated shadow or gossamer villi. No. 2197. X9. 



FIG. 252. External appearance of same specimen. Xl.5. 



FIG. 253. Cross section of No. 1287. Xl.5. 



FIG. 254. Villi from No. 1466. X2.25. 



FIG. 255. Hydatiform villi from No. 2233. X4. 



FIG. 256. Section of chorionic vesicle with hydatiform villi in basal area. No. 2361. Xl.5. 



PLATE 22. 



FIG. 257. Isolated villi from No. 2361, showing both maceration and hydatiform degeneration. X6.75. . 



FIG. 258. External appearance of abortus, same case. X0.75. 



FIG. 259. Changes in external appearance of villi, due to maceration alone. No. 993. X3. 



FIG. 260. Isolated villous tree from same vesicle. X3. 



FIG. 261. Isolated filiform villi. No. 1639. X3. 



FIG. 262. Isolated villous tree. No. 2336. X6.75. 



FIG. 263. Fine hydatiform villi. No. 1797. X3. 



Fio. 264. Normal villi. No. 837. X2.25. 



FIG. 265. Transitional villi between normal and hydatid. No. 432. X2.25. 



FIG. 266. Transitional hydatiform villi. No. 437. X2.25. 



FIG. 267. Normal, knobbed or budded villi. No. 1063. X2.25. 



FIG. 268. Villous tree from a normal specimen, illustrating many small knobs. No. 2335. X6.75. 



FIG. 269. Villous tree showing few buds or knobs. No. 1840a. X2.25. 



FIG. 270. Filiform villi and a portion of the vesicle from the same specimen. X3. 



FIG. 271. Villi showing maceration changes. No. 2348. X6.75. 



PLATE 23. 



FIG. 272. Villi showing maceration changes. No. 2339. X6.75. 



FIG. 273. Villous tree with smooth villi. No. 2253. X6.75. 



FIG. 274. Villous tree with knobbed villi. No. 2372. X6.75. 



FIG. 275. Filiform villus. No. 2326. X6.75. 



FIG. 2V 6. Fine, frowsy villus. No. 2414. X6.75. 



FIG. 277. Massive villous tree. No. 2283. X6.75. 



FIG. 278. Knobbed, curly villi. No. 2384. X6.75. 



FIG. 279. Mossy villi. No. 2249. X4.5. 



FIG. 280. Tubal conceptus (No. 1151), showing disproportion between the chorionic vesicle and the fetus, sparse 



development of the villi, and some hydatiform degeneration. Xl.5. 

 FIG. 281. Villous tree from No. 651ft. X2.25. 

 FIG. 282. Villi from No. 1151, shown in figure 280. X3. 



