MYRIAPODA 



38^ 



of tergites and sternites widen, encroaching upon the membrana dor sails 

 and ventralis (Fig. 344, ter, ster), enveloping the yolk {y). The germ band 

 now being more sharply defined may be designated as the embryo. A 



Fig. 343. — Scolopendra cingulata. Cross section of young embryo soon after flexure of 

 germ band, {coel) Coelome. {dm) Membrana dorsalis. {mge) Mid-gut epithelium, (p) 

 Leg. {sin) Lateral blood sinus (schizocoel). {ster) Anlage of lateral sternite. {ter) Anlage 

 of lateral tergite. {vm) Membrana ventralis. {y) Yolk. {Adapted from Heymons.) 



vm 

 Fig. 344. — Scolopendra. Cross sec- 

 tion, {dm) Membrana dorsalis. {ggl) 

 Rudiment of ganglion before mesad 

 migration, (p) Leg. {ster) Sternite. 

 (ter) Tergite. {vm) Membrana ventralis. 

 {y) Yolk. {Adapted from Heymons.) 



Fig. 345. — Scolopendra. Cross section of 

 stage later than that of Fig. 344. {ggl) 

 Ganglia after mesad migration. Other 

 designations as in Fig. 344. {Adapted from 

 Heymons.) 



distinct but thin and colorless cuticula forms over the body wall. On the 

 lateral margin of the second maxilla a sclerotized egg tooth is developed 

 by means of which the very brittle chorion is broken into equal parts, one 

 hemisphere in part covering the anterior, the other the posterior half of the 



