386 ALOLID A. 
of the foot tentaculiform; jaw with a single row of denticles. 
Radula consisting of one row of plates, their edge serrulate. 
Penis without hooks. H. opalescens, Cooper. California. 
AMowipia, Cuvier. 
Syn.—Molidiana, Quatr. Cavolina, Brug., Orb. Montagua, 
Flem. 
Distr.—4 sp. European seas. 4. annulata, Quoy (xci, 31). 
Rhinophores (upper tentacles) simple; the papillee compressed, 
in transverse, rather distant rows; anterior angles of the foot 
almost rounded; middle projecting piece of the jaw not den- 
ticulated. Spawn of one or two coils. 
JHOLIDELLA, Bergh. 
Distr.—4 sp. Europe. 
Form of the body, tentacles and papille like those of Molis; 
masticatory edge of the jaw minutely plaited; teeth of the 
radula in one row, comb-like, notched in the middle, 
FLABELLINA, Cuvier. 
Distr.—6 sp. Mediterranean, Phillipines. /. coronata, Forbes. 
Body slender, rhinophores perfoliate; tentacles elongated ; 
dorsal papillee on compressed stalks; foot angularly produced 
in front; jaws minutely toothed-margined; radula uniserial. 
Spawn multispiral 
PrerouipiA, Bergh. 
Distr.—\1 sp. P. Sempert, Bergh, 
Rhinophores perfoliate; lower tentacles elongated; dorsal 
papille not caducous, on wing-like, compressed pediments; ante- 
rior margin of foot inflated, tentacularly produced at the sides ; 
jaws toothed ; radula uniseriate ; penis unarmed. 
CraATENA, Bergh. 
Syn.—Cavolina, Brug., part. Hxample.—C. hirsuta, Bergh. 
Rhinophores simple; anterior-angles of the foot rounded ; 
middle part of the jaw minutely denticulated. Spawn arranged 
in one or two coils. 
GONIAOLIS, Sars. 
Distr.—1 sp. Norway. 
Animal with a distinct mantle-border, which gives a square 
form to the body; tentacles not retractile, dorsal very large, 
labial placed at the sides of a large velum; dorsal papille simple, 
scattered on both sides of the back. - 
Rizzouia, Trinchese. 
Example.—R. peregrina, Gmelin. 
Near Cratena and Facelina. by the dorsal appendages. being 
