180 THE GASTROPODA 
Bergh. Fanny 7. Fronipax, Alder and Hancock. Dorsal tegumentary 
papillae provided with a membranous expansion ; liver in the form of 
two longitudinal canals into which the caeca of the dorsal papillae open ; 
male and female orifices at some distance from one another ; pelagic. 
Fic. 167. 
Pleurophyllidia lineata. A, dorsal view; B, 
ventral view. 0b, the mouth; 7, lamelliform 
pallial gills (the posterior part of the foot bears 
a median glandular tract). (From Lankester, 
after Souleyet.) 
Fic. 169. 
Pseudovermis paradoxus, 
dorsal aspect. a, anus ; cd, 
cnidosac ; e, eye ; k, kidney ; 
1, liver; m, mouth (on the 
7 ventral side, seen through 
Fie. 168. the transparent head) ; ns, 
Hedyle glandulifera, dorsal aspect. e, nervous system ; of, oto- 
eye ; f, foot (posterior part) ; ”.s, nervous cyst; ph, pharynx; st, 
system; ph, pharynx ; sp, spicula ; v.m, stomach. (After Kowalew- 
visceral mass. (After Kowalewsky.) sky.) 
Genus— Fiona, Hancock and Embleton. Famity 8. PLEUROPHYLLIDIDAE, 
Adams. Anterior tentacles in the form of a digging shield; mantle 
naked ; tegumentary papillae or “branchie” situated along the sides of 
the foot, beneath the mantle border. Genus— Pleurophyllidia, Meckel 
(Fig. 167). Famity 9, DerMATOBRANCHIDAE, Fischer. Like Plewro- 
