622 EMBRYOLOGY OF THE TURTLE. Part III. 
14g, 15, 15a, 34, 34a, 16, 16a, and 16b, no date, opened August 30, 1852; fig. 20 
to 20d, 21, and 21a, no date, opened August 25, 1852; fig. 29 and 31, no date, 
opened in August, 1852; fig. 32 to 32d, no date, opened September 9, 1852. 
Pl. 24, fig. 6, no date, opened September 2, 1852. PI. 25, fig. 1 to 1d, no date, 
opened August 30, 1852; fig. 5, no date, opened August 31, 1852.—p. 570. 
Thirtieth Stage. All just hatched or hatching. Pl. 18, fig. 2, 4, and 4a, no date ; 
fiz. 10, 10b, and 10c, no date, opened August 31, 1855; fig. 10a, 10d, 10e, and 
10f, no date, opened September 5, 1855. PI. 25, fig. 8, 3a, 7, and 7a, no date ; fig. 
9; (see Pl. 18, fig. 10d). Pl. 19, fig. 27 and 27a, laid June 21, opened October 19, 
1855; fig. 29, 29a, 30, 31, and 33, no date; fig. 34, laid June 21, opened October 
17, 1855; fig. 35, and 35a, see Explanation of Plates. Pl. 20, fig. 18, laid June 21, 
opened October 17, 1855. Pl. 22, fig. 5, 6, 6a, and 6b, no date. Pl. 9e, fig. 11 and 
lla, no date. Pl. 9a, fig. 31 and 3la, laid June 21, opened October 25, 1855.— p. 
572. 
Thirty-jirst. Stage. All hatched in October, 1855. PI. 17, fig. 1, no date. Pl. 19, 
fig. 14, 15, 16, 16a, and 17 to 17b, no date. Pl. 20, fig. 3, 13, 13a, 14, 14a, 15, 16, 
and 17, no date. PL 21, fig. 10, 11, 12, 13, 13a, 17, 18, 18a, 18b, 18¢e, 19, 33, and 
33a,.no date. Pl. 22, fig. 1, la, 1b, 2, 3, 3a, 4, 4a, 8, and 8a, no date. PI. 23, fig. 
4, 4a, 5, 6, 7, 8, 9, 10, and 11, no date. Pl. 9e, fig. 12, no date.—p. 578. 
A careful preliminary comparison of these references with the Explanation of 
the Plates will greatly facilitate the reading of the text. 

