Fig. 4

Pn-vasa mRNA in the parapodia of the mid-body region of the adult worm. A Hybridized worm showing the weak vasa expressions in the parapodia, dorsal view. A’ Coronal section of (A) showing the distribution of the Pn-vasa positive cells in the parapodia and in the coelomic cavity (Co). B A single parapodium showing a large cell cluster and smaller cell clusters. C–E Cell clusters of various forms with Pn-vasa signals. P, posterior direction; A, anterior direction; G, gut. Scale bar: B–E (50 μm)