486 



Man 



ON INCREASE IN SIZE 



Table 64. Gestation time and incubation time.* 



[PT. Ill 



Species 



Albino rat 



Norway rat 



" . "* 



Guinea-pig 



Sheep 



,, ... 



Cow 

 Horse 

 Opossum 

 Rhinoceros ... 

 Elephant 



Jackal {Anubis pavian) 

 Dog 



Pig 



Goat 



Coyote {Canis 



ockropus) ... 

 Raccoon {Procyon 



californicus) ... 

 Coatis {Nasua ?) 

 Opossum {Didelphys 



virginiana) ... 

 Chimpanzee 



Mammals 



Extreme 

 variation 



Gestation time in days 

 280 

 272-5 

 272-2 

 272-2 (calc. from date of last 



menstruation) 

 280-5 (conception calc.) 

 270 



279-14 (primipara) 

 281-99 (multipara) 

 271-0 



282-5 (fo'" male foetus) 

 284-5 (for female foetus both calc. 



from last menstruation) 

 282-8 (for male foetus) 

 282-0 (for female foetus both calc. 



from last menstruation) 

 272-6 (for male foetus) 

 267-5 (for female foetus both calc. 



from one definite coitus) 



279 



21-6-22-64 

 Gestation time may be pro- 

 longed from I to 6 days if it is 

 simultaneous with suckling 

 21-0 



23-5-25-5 (probably suckling) 

 64 

 146 



145-153 — 

 275-291 (according to breed) 210-335 



334-359 264-420 



13 — 



540 — 



630 — 



210 — 



60 55-68 



120 104-133 



151 — 



65 - 



65 



71 



13 

 210-245 



137-162 



Birds 



Investigator 

 Hippocrates 

 Leuckart 

 Lowenhardt 

 Hasler 



Schlichting 

 Zollner 



Ahlfeld 

 Robertson 



— Siegel t 



Hecker 



Stotsenberg 



King 



Lantz 



Miller 



Draper 



Schwarz 



Sabatini [Brody 



Franck-Albrecht and 



Ewart 



Heuser & Hartmann 



Feldman 



Heinroth 

 Schwarz 



Asdell 



Gander 



— Borland & Hubeny 



Species 



Swan 

 Goose 



Duck 



Hen 



* See also Tabulae Biologicae, vol. 6. 



I Siegel's figures were obtained during the war on the basis of very accurate data (see 

 also Jolly) . 



