SPOLIA NEMORIS. - 85 
accomplished. But then, on the other hand, the domestic 
animals have in later years been often shown to furnish us with 
data that are more liable to a certain amount of divergence 
than those which have been obtained from animals living in 
absolute freedom. There can hardly be a doubt that the 
inevitable pammixia which accompanies domestication can 
alter and render variable parts of the organism both internal 
and external, which have a more fixed standard in their non- 
domesticated congeners.! 
For this reason the study of mammalian ontogeny, not from 
the rabbit and the Cavia, but from specimens of other species 
and genera captured in their natural haunts, deserves special 
recommendation. 
The object of this paper being to establish certain general 
facts that come to light when the pregnant stages of the five 
genera in question are compared macroscopically, and before 
the microscope is as yet brought to bear on the numerous and 
intricate questions of histological detail, it will recommend 
itself to treat the five genera separately. 
Tarsius spectrum. Figs. 1, 2, 18—21, 47—49. 
There can be no question that all the specimens obtained 
by me belong to Tarsius spectrum, Pall., and not to Tarsius 
fuscomanus, Fisch. The differences between these two species 
have lately been fully discussed by Weber in vol. iii, p. 260, 
of his ‘ Zoologische Ergebnisse einer Reise in Niederlandisch 
Ost-Indien,’ Leiden, 1893. None of the uteri in my collection 
were obtained from the localities to which Tarsius fuscomanus 
is restricted. The name by which Tarsius is known to the 
natives in South-west Sumatra is singo puar; those of Banka 
call it the berook puar, or mentiling ; those of West Borneo, 
tempiling. 
Renson, ‘Contribution a l’embryologie des organes d’excrétion des 
oiseaux et des mammifeéres,’ Bruxelles, 1883, p. 37. 
C. K. Hoffmann, “ Die Bildung des Mesoderms, &c.,” ‘ Verh. v. a Kon 
Akad. v. Wetenschappen te Amsterdam,’ 1883, p. 2. 
J.v. Erp, Taalman Kip, ‘ De ontwikkeling der Miillersche gang by de 
zoogdieren,’ Dissert. inaug., Utrecht, 1893, p. 77. 
