COMPOI'XD EVI-:S OF AimiROl'ODS. 



VII.— Explanation of Figukes. 



Lid of Reference Letters. 

 Ap. Appendage. 



Ax. p. Axiul process of the ganglion cell. 

 B. M. Basement membrane. 

 G. Corneal lens. 

 c. Cornea or corneal facet, 

 c. c. Crystalline cone. 

 Uh. Cliitin. 

 e.g. Corneagen. 

 d.f Dorsal fold. 



D. 0. Dorsal organ. 



E. Eye (compound). 

 Ect. Ectoderm. 

 Ent. Entosternite. 

 Ep. Epithelial cell. 

 F.y. Food-yolk. 



G. Ganglion cell. 

 H. Hyaline cell. 

 L. Lens-cone. 

 Ms. Mesoderm. 

 JV. Xucleus. 

 Oc. Ocellus. 

 Om. Ommatidinm. 

 Op.n. Optic nerve fibre. 

 p. r. Packing cell. 

 p. n. Perineural cell. 

 Pg.c. Pigment cell. 

 Pg. p. Pigment patch. 

 Rb. Rhabdomere. 

 Rt. Retinula. 

 Tr.fb. Transverse striae. 

 V. Vitrella. 



V. C. Ventral nerve chain. 

 v.f. Ventral fold. 



X. Axial space or line of the ommatidium, corresponding to the 

 cavity of the invagination. 



