16 : CARL G. HARTMAN 
No. 349’. Killed Feb. 2, 11 p.m. (interval 3 days, 7 hours); 10 eggs: 
9 vesicles 8 to 10 mm. in diameter with embryos of about 10 somites; 
one small vesicle. 
No. 351. Jan. 30, 5 p.M., animal was opened: freshly burst follicles 
on left ovary, but no eggs in left oviduct. 
No. 351’. Killed at 7:30 p.m., 23 hours later; 14 eggs with a little 
albumen found in right oviduct (fig. 2*, pl. 3; fig. 4, pl. 18). 
No. 352. Jan. 30, 5 p.m.; 16 eggs: 9 unfertilized; of the 7 remaining, 
3 are like eggs No. 40, the others less advanced and perhaps not quite 
normal (figs. 1* and 2, pl. 9; fig. 14, pl. 13; fig. 2, pl. 18; fig. 8, pl. 21). 
No. 352’. Killed Jan. 31, 8 a.m. (interval 15 hours); 20 eggs: 8 un- 
fertilized, one egg with dead vesicle; one egg with two vesicles; the 
remainder bilaminar vesicles fill one-half to three-quarters of the egg, 
which measured fresh about 0.75 mm. (fig. 4*, pl. 9; fig. 4, pl. 10; 
fig. 4, pl. 19). 
No. 358. Jan. 30, 7:45 p.m., 16 eggs: 5 unfertilized; 11 bilaminar blas- 
tocysts measuring in alcohol 1.1 to 1.8 mm. (figs, 3, 3A, 3B, 3C, pl. 22). 
No. 353’. Killed Jan. 31, 1 a.m. (interval 5+ hours); 12 eggs: one 
unfertilized; one dead; 10 blastocysts 2 mm. and less in diameter, 
showing the proliferation of first few mesodermal cells (fig. 21, pl. 18). 
No. 356. Had been in cages some time before first operation, Jan. 30,° 
8:45 p.m.; 15 eggs: 10 normal blastocysts averaging about 0.18 mm. 
through ovum, with numerous entodermal mother cells at formative 
pole and considerable attenuation of non-formative pole; one ab- 
normal blastocyst with large blastomere (fig. 14, pl. 22); 4 unfertilized 
eggs (fig. 1, pl. 6; figs. 1* and 2, pl. 8; fig. 3, pl. 9; fig. 4, a 12; fig. 12, 
pl. 13; figs. Ato ipl. 17). 
No. 356’. Killed Wah, 3, 12:30 a.m. (interval 3 days, 33 hours); 6 
vesicles about 3 mm. in diameter, with short medullary groove. 
No. 360. Jan. 30, 9:30 p.m., 11 eggs: 10 bilaminar blastocysts 
about 1.5 mm. in diameter; one unfertilized egg (fig. 6 and stereogram, 
fig. 8, ply 10: figsG6, pl. 22). 
No. 360’. Killed Feb. 2, 7:30 p.m. (interval nearly 3 days); 2 ab- 
normal and 18 normal embryos about’ 5.75 mm. in length with first 
rudiment of allantois. 
No. 415. Feb. 10, 11 fragmenting eggs in early stage of pseudo- 
pregnancy, presented for the false ‘2-celled’ and ‘4- celled’ eggs seen in 
figure 5, plate 11*. 
3. Material arranged according to stage of, development. The 
following tabulation is arranged by stages for ready reference. 
Within a given stage the litters are also placed in ascending 
order of development. 
1. Ripe ovarian eggs: 21, 28. 
2: Pubal-ova: S6.76ne07, 301") slo roto 
