Prarroe 
ErGen te Fic. 2. 
Fic. 1—Human embryo 8 mm. long with spina bifida. After Torneau 
and Martin (Journal d’Anat. et Physiol., XVII, 1881). 
Fic. 2—Spina bifida in a human embryo 10 mm. long. After Fischel 
(Ziegler’s Beitrage, XLI, 1907, Fig. 16). 
Fics. 3 and 4.—Sections through the middle of the spina bifida shown in 
Fig. 2. After Fischel (Ziegler’s Beitrage, 1907, Figs. 21 and 22). 
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