194 MANUAL OF THE MOLLUSCA. 



1 



Animal slender, elongated ; tentacles linear, retractile into trumpet- 

 shaped sheaths ; veil small, simple ; gills ovate, muricated, 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 faU off readily wheif the animal is handled, and are soon 

 renewed, 



Distr. Norway, Brit. On corallines in deep water — 50 fms. 



? Melibcea, Rang. 



Type, M. rosea. Rang ; on floating weed, off the Cape, 



Animal elongated, with a narrow, channelled foot and long slender tail; 

 sides of the back with 6 pairs of tuberculated lobes, easily deciduous ; tenta- 

 cles cylindrical, retractile into long trumpet-shaped sheaths ; head covered by 

 a lobe-like veil ; sexual orifices behind right tentacle, excretory behind first 

 gill on the right side. 



? LoMANOTUS, Verany. 



Ex. L. marmoratus, PI. XIII. fig. 12. Syn. Eumenis, A. and H. 



Animal elongated, smooth ; head covered with a veil ; tentacles clavate, ] 

 laminated, retractile into sheaths ; gills filamentose, arranged along the sides ^ 

 of the back, on the wavy margins of the mantle; foot narrow, with tenta- | 

 cular processes in front ; stomach ramified. J 



Distr. Brit. Medit. On corallines. h 



FAMILY VIII. ^OLiD^. \ 



Animal with papillose gills, arranged along the sides of the back ; ten- ' 



tacles sheath-less, non-retractile ; lingual teeth 0.1.0.; ramifications of the I 



stomach and liver extending into the dorsal papillte ; excretory orifices on the i 



right side ; skin smooth, without spicula ; no distinct mantle. B 



^OLis, Cuvier. | 



Spi. Psiloceros, Menke. Eubranchus, Forbes. Amphorina, Quatref. I 



Type, M. papiUosa, L. Etym. ^olis, daughter of J^]olus. ■, 



Animal ovate; dorsal tentacles smooth, oval, slender; gills simple, 



cylindrical, numerous, depressed and imbricated ; mouth with a horny upper 



jaw, consisting of two lateral plates, united above by a ligament; foot \ 



narrow ; tongue with a single series of cm-ved, pectinated teeth ; spawn of ^ 



numerous waved coils. > 



Sub-genera. Flahellina, Cuv. (Phyllodesmium, Ehr.) Body slender; \ 



dorsal tentacles laminated, buccal long; papiUse clustered; spawn multi- i 



spiral. Ex. E. coronata, PI. XIII. fig. 13. (also fig. 11, p. 23.) \ 



Cavolina, Brug. (Montagua, Flem.) C. peregrina. Body lanceolate ; ten- 

 tacles smooth or wrinkled ; papillse in transverse, rather distant rows ; spawn 



of 1 or 2 coils. { 



