Class VI. MAMMARIA. 107 



GENUS XXV. MAMMARIA. 



Body smooth. 



Mouth above, without cirri. . 



Aperture one. 



Gm. Lin. 3135. Mem. JFern. Soc. 55?. !• Mammil- 



la. 



* M. Conically ventricose ; white. 



Found on the shore near Leith, adhering to 

 fuci. 



