334 MANUAL OF THE MOLLUSCA, 
? DENDRONOTUS, A. and H.* 
Etymology, dendron, a tree, notos, the back. 
Type, D. arborescens, Pl. XIII., Fig. 10. 
Animal elongated; tentacles laminated; front of the head 
with branched appendages; gills arborescent, in single serieg 
down each side of the back ; foot narrow ; lingual teeth 10.1.10; 
stomach and liver ramified. 
Distribution, 8 species. Norway and Britain. On sea-weed 
and corallines ; low water—coralline zone. 
? Doro, Oken. 
Etymology, doto, a sea-nymph. 
Example, D. coronata, Pl. XITI., Fig. 11. 
Animal slender, elongated; tentacles linear, retractile into 
trumpet-shaped sheaths; veil small, simple; gills ovate, muri- 
cated, in single series down each side of the back; lingual 
membrane slender, with above 100 recurved, denticulated teeth, 
in single series; foot very narrow. 
The stomach is ramified, and the liver is entirely contained in 
the dorsal processes, which fall off readily when the animal is 
handled, and are soon renewed. 
Distribution, 4 species. Norway and Britain. On corallines 
in deep water—50 fathoms. 
GELLINA, Gray. 
Head simple ; papille or gills smooth. 
Distribution, 1 species. North Sea. 
? MEeLipaa, Rang. 
Type, M. rosea, Rang; on floating weed, off the Cape. 
Animal elongated, with a narrow, channeled foot and long, 
slender tail; sides of the back with 6 pairs of tuberculated lobes, 
easily deciduous; tentacles cylindrical, retractile into long 
trumpet-shaped sheaths; head covered by a lobe-like veil; 
sexual orifices behind right tentacle, excretory behind first gi.l 
on the right side. 
Distribution, 3 species. South Sea and South Africa. 
? LoMANOTUS, Verany. 
Example, L. marmoratus, Pl. XITII., Fig. 12. 
Synonym, Humenis, A. and H. 
* This and the following genera are placed by Alder and Hancock in the family 
“tiolide ; they have a ramified stomach, but their external (zoological) characte-s 
agree better with Zritonia than olis, 
