3883 MOLIDA, 
MatTHARENA, Bergh. 
Distr.—| sp. N. Europe. 
Papille in transverse and oblique series. 
CACINELLA, Bergh. 
Distr.—C. luctuosa, Bergh. | Philippines. 
Rhinophores sheathed; dorsal papille uniserial; with pos- 
terior claviform appendices ; radula uniserial. 
CERBERILLA, Bergh. 
Distr.—1 sp. Samoa Islands. 
Upper tentacles perfoliate, under tentacles elongate, dorsal 
papillz situated on short pedicels; jaw smooth; teeth of the 
radula in a single row, irregularly denticulated. 
Fiona, Alder and Hancock. 
Syn.—Oithona, A. and H. (not Baird). 
Distr.—4 sp. Falmouth. Under stones at low-water.—Dr. 
Cocks. F. nobilis, A. and H. (xci, 35). 
Animal elongated; oral and dorsal tentacles linear; mouth 
armed with horny jaws; gills (7?) papillary, clothing irregularly 
a subpallial expansion on the sides of the back, each with a 
membranous fringe running down its inner side. 
SupraMity HH RMAIN A. 
Branchie papillary ; tentacles non-retractile ; mouth unarmed, 
or with corneous jaws. 
Awupert1aA, Allman. 
Etym—Named after Joshua Alder, one of the authors of the 
‘* Monograph on the British Nudibranchiate Mollusca.” 
Syn.—-Styliger, Lovén. 
Distr.—4 sp. Norway,South Ireland, and South Wales. A. 
modesta, Lovén (xci, 36). 
Animal oblong, without tentacles; head lobed at the sides ; 
papille arranged down the sides of the back; vent dorsal, 
posterior. 
Erconanta, Trinchese. | 
Distr.—3 sp. Mediterranean. 
Body subcylindrical ; head small, without velum ; foot narrow, 
with rounded anterior angles ; branchiv numerous, sprinkled 
with whitish globules ; rhinophores long, graceful, very faintly 
canaliculate ; anus in the middle of the back, in front of the 
heart. ie 
PHYLLOBRANCHUS, Alder and Hancock. 
Syn.—Lobifera and Polybranchia, Pease. 
Distr.—5 sp. Ceylon, Red Sea, Philippines, West Indies, 
Medit. P. orientalis, Kel. sini Mata ea ae Na Bat ic ott as 
