66 



CONCHIFERA. 



open "below ; slphonal orifices one or two ; foot 

 lengthened, cylindrical or strap-shaped, protruded 

 at the base of the shell. 



Galeomma (Tarton). Shell thin, oval, equal- 

 sided, gaping widely below, covered with a thick 

 fibrous epidermis ; ligament internal ; teeth ^. 

 Animal with one siphonal orifice. 

 G. Turtoni. Fig. 99 ; 



n.s. 



Lepton (Turton). Shell roundish, flattened ; 

 hinge-teeth 5. or i, in front of an angular cartilage 

 notch ; laterals |, \. Animal with one siphon ; 

 mantle edges fringed ; foot thick, heeled and 

 grooved, forming a creeping disk. 



L, Clarkiee. 

 convexum. 

 nitidum. 

 squamosum. Fig. 100 ; n. s. 



i%i 



102 



103 



Montacufa (Turton). Shell minute, oblong, 



hinge-line notched ; ligament internal, between 



two diverging teeth. Animal with the mantle- 

 edges simple, open in front. 



M. bidentata. 

 ferruginosa. 

 substriata. Fig. 101 ; mag. 



Kellia (Turton). Shell small, roundish; beaks 



