XX SYNOPSIS OP THE GENERA. 



Subclass II. EUTHYNEURA. 



Ord. 1. OPISTHOBRANCHIA. 



Subord. 1. TECTIBRANCHIA. 



Tribe 1. BULLOMORPHA. 



Fam. Acteonidce. Acteon, Pupa, Leucotina, Bullina. 



Fam. Ringiculidce. Ringicula. 



Fam. Tornatinidce. Tornatina, Volvulella. 



Fam. Scaphandridce. Cylichnella. 



Fam. Bullariidce. Bullaria. 



Fam. Aceridoe. Acera, Haminea. 



Fam. Philinidce. Pliiline. 



Fam. Aglajidce. Aglaja. 



Tribe 2. APLYSIOMORPHA. 

 Fam. Aplysiidce. Tethys, Notarchus. 



Tribe 3. PLEUROBRANCHOMORPHA. 



Fam. UmbracuUdce. -Umbraculum. 



Fam. Plewobranchidce. Pleurobranchus, Pleurobranchaea. 



Subord. NUDIBRANCHIA. 

 Tribe 1. TRITONIOMORPHA. 

 Fam. Tritoniidce. Tritonia. 



Tribe 2. DORIDOMORPHA. 



Fam. GoniodorididcB. Goniodoris, Acanthodoris. 



Fam. Dorididce. Doris, Rostanga, Alloiodoris, G-argamella, Atagema, 



Chromodoris, Aphelodoris. 

 Fam. Doriopsidcs. Doriopsis, Doriopsilla. 



Tribe 3. EOLIDOMORPHA. 



Fam. Eolidid(B. Eolis, ^Eolidiella, Facelina, Eolidia, Hervia. 

 Fam. Proctoitotidce. Antiopella. 

 Fam. Fionidce. Fiona. 



Tribe 4. ELYSIOMORPHA. 

 Fam. Hermceidce. Stiliger. 



