620 EMBRYOLOGY OF THE TURTLE. Part III. 
Thirteenth Stage. Pl. 12, fig. 6, no date; opened July 28, 1852; fig. 13, laid 
July 18, opened July 28, 1852. Pl. 19, fig. 1, 6; (see Pl. 12) fig. 13). Pl 21, 
fir. 27, and 28; (see Pl. 12, fig. 13). Pl. 9a, fig. 28; (see Pl. 12, fig. 6).— p. 550. 
‘ourteenth Stage. Pl. 9e, fig. 7; (see Pl. 18). Pl. 18a, fig. 11, and 12, laid July 
14, opened Aug. 2, 1852; fig. 13, laid July 15, opened July 26, 1852; fig. 14, 
laid July 10, opened July 20, 1852. Pl. 18, fig. 5, and 7, laid July 11, opened 
July 22, 1852. Pl. 24, fig. 8, laid June 22, opened July 22, 1852.—p. 501. 
Fifteenth Stage. Pl. 18a, fig. 14, laid July 10, opened July 20, 1852. Pl. 19, 
fig. 5, 5a, 5b, and 4d, laid July 10, opened July 20, 1852.— p. 552. 
Sixteenth Stage. Pl. 13, fig. 2, no date, opened Aug. 8, 1852; fig. 3, laid June 
18, opened July 10, 1855; fig. 8, laid June 12, opened July 11, 1855; fig. 12, 
laid June 18, opened July 10, 1855. Pl. 14, fig. 6; (see Pl. 15, fig. 12). Wood- 
cut 1.—p. 555. 
Seventeenth Stage. PL 24, fig. 7, and 7a, no date, opened July 30, 1852; fig. 
14, laid July 14, opened August 2, 1852; fig. 15, no date, opened July 31, 1852. 
Pl. 18a, fig. 11, 12; (see Pl. 24, fig. 14).—p. 504. | 
Eighteenth Stage. Pl. 14, fig. 5, laid June 18, opened July 17, 1855. Pl. 17, 
fig. 5; (see Pl. 24, fig. 9, and 9a). Pl 24, fig. 1, and la, no date; fig. 9, 9a, 
and 12, no date, opened August 6, 1852, p. 556. 
Nineteenth Stage. Pl 14, fig. 4, laid June 20, opened July 18, 1855.— p. 
Twentieth Stage. Pl. 16, fig. 6, 6a, laid June 20, opened July 17, 1855.— p. 
Twenty-first Stage. Pl. 14, fig. 2, and 2a, laid June 22, opened July 17, 1855; 
fiz. 3, laid June 18, opened July 25, 1855. Pl. 18, fig. 8, no date, opened 
August 21, 1852. Pl. 18a, fig. 6, 7, 7a, 8, and 9, laid June 18, opened July 25, 
1855; fig. 10, laid June 13, opened July 17, 1855. PI. 20, fig. 12; (see Pl. 24). 
Pl. 24, fig. 2, and 2a, laid June 21, opened July 31, 1855. Pl. 22, fig. 9, no date. 
Pl. 9e, fig: .8,.8a, 9, and 9a;’' (see PL. 14, fig: 2) 2a). -_ Pl: 19, fig. 4517, about 
18 days old.—p. 558. 
Twenty-second Stage. Pl. 24, fig. 5, and 3a, laid June 25, opened July 30, 18585. 
—p. 561. 
Twenty-third Stage. Pl. 15, fig. 13, laid June 18, opened July 31, 1855; PI. 
24, fig. 4, laid June 12, opened July 29, 1855; fig. 11, laid June 21, opened 
August 8, 1855. Pl. 16, fig. 3, laid June 16, opened August 1, 1855. Pl. 18a, 
fig. 4, and 5; (see Pl. 24, fig. 4).—p. 561. 
Twentyfourth Stage. Pl. 14, fig. 1, laid June 23, opened July 31, 1855. PI. 
15, fig. 11, laid June 10, opened August 2, 1855; fig. 12, and 12a, laid June 10, 
opened August 1, 1855. Pl. 17, fig. 4, 4a, no date, opened September 17, 1855; 





