44 PLEUROniYLLIDIID/E. 



Fam. PLEUKOPHYLLIDIID.E. 



Tongue broad; teeth, many in each cross series; jaws 

 horny; tentacles simple, united, expanded. Gills in folds 

 on the under side of the edge of the mantle, which is 

 bent up. Vent lateral, posterior. 



In the singular animals of which this family is composed 

 there is no shell, the orifices of generation are in a common 

 tubercle on the right anterior side, and the vent is at the 

 right posterior side of the body ; the tentacles, moreover, 

 are dilated and connate, forming a frontal veil. 



Genus PLEUROPHYLLIDIA, Meckel. 



Body depressed. Head partially concealed by the mantle ; 

 tentacles dilated and connate, forming by their union a 

 broad, transverse, frontal veil. Mantle large, expanded, 

 smooth, simple above. 



Syn. Diphyllidia, Cuvier. Linguella, Blainv. Armina, 

 Rqfi?i. 



Ex. P. lineata, Otto, pi. 68, fig. 3. 



The lamellated gills occupy the two posterior thirds of the 

 under margin of the mantle. A remarkable feature of the 

 animal is the broad veil formed by the expanded tentacles. 

 There are two species from the Mediterranean, and two from 

 tropical seas. 



Species of Pleurophyllidia. 



lineata, Otto. rubida, Gould. 



ocellata, Cuv. verrucosa, Cantr. 



pustulosa, Phil. 



