Cuap. II. LAYING OF THE EGGS. 499 
below among the foot notes, for the times of laying, which indicate also when the 
eggs were found in the oviducts and when in the ovary, it may be possible to form 
some idea of the difficulty which the solution of this problem presents, when we 
see, that, for instance, Cinosternum pennsylvanicum in one case had eggs in the 
oviduct by July 38, whilst in another they were still in the ovary as late as July 
30, and in still another of the latter date they were partly in the ovary and 
partly im the oviduct. Again: on the 21st of June, 1856, six specimens of Nane- 
mys guttata were opened, and all found to have already laid; whilst on the 25th 
of June, 1855, this same species had not finished depositing its eggs; thus show- 
ing nearly a week’s variation, no inconsiderable amount of time when we reflect, 
that, with this species, the laying season lasts but a week. This observation loses 
much of its importance, however, from the fact that it relates to broods laid in 
two different years. 







































EMYS MELEAGRIS. GLYPTEMYS INSCULPTA. 
j 7 = 
Ovaries. | Ovipucts. | Ovaries. | Ovipvcts. 
DATE. ee ee |e a REMARKS. Date. /Larp. REMARES. 
Right. Left. rig Le. Right. Left. Right. Left. 
June 30,54) — |—]| 4 | 5 | — |In confinement. May 3,'54 | 5 | 2 | — | —| — |All the specimens of this 
July 17,°55) 4 3 | — | — | — |Next year’s brood. May 5,’54 | 4 2 | — |—]-—] species were kept in 
May 9, ’54 4 0 — |—)}—] confinement, but not till 
May 11,54) 3 3 =<, |) |) = after fecunduation. 
May 13,54) 3 4) — |} —|}— 
NANEMYS GUTTATA. May 17,54) — |—]| 1 | 2 | — |No shell; animal young 
May 18,°54) — |—| 2 | 5 | — |No shell. 
7 | ill | May 20,54) — |—| 4 2 | — |Shell soft. 
Ovaries. | Ovipucts. May 23, 54; — | —| 8 AN 
ayers Law. REMARKS. May 27, 64) — |—| 8 4 | — |Shell soft; yolk segment’g. 
=. May 28, 54) — | —]| 4 3 | — |Yolk segmenting. 
Right. | Left. Right. Left. May 29,’54) — |—| 4 | 2 | — 
May 8, °54 4 0 | — | —} — /In confinement. 
May 12, °54| 2 ] 0) et S CISTUDO VIRGINEA. 
May 19,’54) 2 | 2 | —|}—j);— |" s 
MayoeEe 8 | cy =| — ces 
May 30,’54; — |—] 2 |1]—]|* 3 Ovarres. | Ovipucts. 
May 81,54] 2 1/—|]—};-—j*“ se ; 
June 8,’54 | — |—j| 1 2);/—\* G Shell thin, Date. l Lar. REMARKS. 
soft. |Right. Left. /Right.|Left. 
June 8,’54 | — | — | 2 1 | — {In confinement. | | | 
June 20,55) — | — | — | — | laid |First date of laying. | | 
June 21,°53) 1 2 | — | —]|— |Next year's brood. The June 5,’54 | — | —]| 2 3 | — |Rather soft shell. 
oe 1 0 —!)-)|/— cicatrices on the ovary) June 6,54 | 2 2 — | — | — |In confinement. 
bs 1 alan treshis June 25, °55) — | — | 6* | — | — |Opened as soon as caught. 
Bs 1 PAN | a June 30,’54) — |—]/ 8 2 | — |In confinement. 
“ 2 —= — —_— 
“ ; 0 — —_ 
June 21, °55| — | — | — | — | laid} _ 
June 25,55) — | — | 3* | — | — |Five Turtles opened; and XEROBATES CAROLINUS. 
all but one had Jaid. 
June 26,52) — | — | 2 | — | — |In confinement. 
June ae 53) 1 2/—/;-|— |Next gaara brood: The Dyieres sl hOwmnoss® | 
June 29, 53 : f Sed jee ioe cicatrice resh. Dave. cern nea 
sf oo eae SS Right.|Left. Right. | Left. | 
“ 2 0 = ia ue | | 
“ 1 0 eS ew es “ | 
pe | 9 ee (el (es me “ d — |}—] — | — |lays.|In New Orleans. 
July 9,°52 | — | — | — | — |laid|Inconfnt. Embryo alive. June. | | 7) 
July 10,752); — | — | — | — | laid ne re 
July 11, Ted] || | a |e eke ce - 
* 3, 52) — —_ — — } lai ae S “4s . 
JuP ie ‘3 Ty ee ae all we “« The * * mark the eggs the position of which, on 
? = . o, . ~ - 
the right or left side, was not noticed. 

