ORTHOPTEROIDEA (PANORTHOPTERA) 



mes 



229 



coel 



Fig. 148. — Locusta. Cross section stcond maxillary segment, of 56-hour embryo, {coel) 

 Coelomic cavity, {ect) Ectoderm, {mes) Mesoderm forming coelomic sac. 



ser 



am am.cav 



Fig. 149.— Locwsto. Cross section of ninth abdominal segment of 72-hour embryo. 

 {am) Amnion, {am. cav) Amniotic cavity, {dc) Provisional dorsal closure, {ect) Ecto- 

 derm, {il) Inner layer, {ser) Serosa. 



mes 



coel 



Fig. 150. — Locusta. Cross section of second abdominal segment, {am) Amnion, {coel) 

 Coelomic cavity, {ect) Ectoderm, {mes) Mesoderm. 



am 



Fig. 151.— Locusta. Cross section of fourth abdominal segment of 75-hour embryo. 

 {am) Amnion, {coel) Coelomic sac. {dc) Provisional dorsal closure, {ect) Ectoderm. 

 {mes) Median mesoderm. 



