Smithsonian Report, 1914.—Schmit-Jensen. PLATE 1. 
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Fig. 1.—Spontaneous case of substitutional homoeosis in antenna of larva of Carausius (Dixippus) 
morosus. Head from dorsal side. Microphotograph taken shortly after the eedysis, October 24, 
1911; magnified 7-8 times. 
Fic. 2.—Head of same individual as fig. 1, from dorsal side. Microphotograph taken shortly after 
the ecdysis, November 18, 1911; magnified 6-7 times. 
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i 
4 
Fic. 3.—Experimental homceotic formation in a nearly full-grown larva of Carausius. The regenera- 
tion, seen from the dorsal side, consists of a claw joint and three small, short tarsal joints without 
distinct plantula. It grew from the basal joint and thus belongs to group A. Microphotograph 
from balsam-mount; magnified about 16 times. - 
Fig. 4.—Distal end of a young regeneration of a leg of a Carausius larva. Microphotograph from 
dorsal side; balsam-mount; magnified about 16 times. 
