282 



Transactions. 



Fig. 117. — Larva A : 6th segment (dorsal), showing special cells. 



Fig. 118. — Larva A: special cells, enlarged. 



Fig. 119. — Larva B: portion of dorsum, showing four spines of primary 



armature and secondary spines surrounding them. 

 Fig. 120. — Margin of integument, showing the scale processes. 

 Fig 121. — Fan spine, showing thickness. 



Note. — The posterior half of the segment shows the reduced remains 

 of the primary spines of the original 7th segment. 



