PLATE 5. 



Recoustruction of anterior end of body of Proneomenia acuminata. 



Section through pharynx along line C of fig. 1. 



Entire animal. X 2. 



Spines from sides of body. X 100. 



Reconstruction of posterior end of body. Sg, shell gland. 



Hyjiodermis and papillae. X 190. 



Section through pharynx (ph) at level of subradular ganglia (srg) above which are 

 ducts of the ventral salivary glands. 



Fig. 8. Section along hne F of fig. 5 int, intestine. 



Fig. 9. Section along line A of fig. 1. 



Fig. 10. Section along line D of fig. 5. da, dorsal aorta; ht, heart; sr, seminal receptacle. 



Fig. 11. Section through cloacal chamber along line G of fig. 5. 



