or Little Known, Polyzoa. 137 



small, globose, smooth, three spines shewing on each side in 

 front of it. 



Sorrento, Mr. J. B. Wilson. 



Allied to M. Peachii, from which it differs in the greater 

 prominence of the mouth, the larger size of the mucro, the 

 stouter spines (the articulations of which are usually dark- 

 coloured), and the presence of three spines on each side in 

 front of the ovicell. It is probably also closely related to 

 M. teres, described by Hincks, from specimens dredged off 

 Curtis Island. 



Mucronella serratula, n. sp. Fig. 9. 



Cells irregular in shape, rhomboidal or elongated, distinct, 

 separated by faintly raised margins ; front slightly convex, 

 glassy, and more or less covered with distinct round granul- 

 ations ; mouth with margin smooth or usually with a rounded 

 somewhat digitiform projection of the peristome, about the 

 middle on each side ; mucro large, upper edge straight and 

 serrated, and seemingly with a transverse avicularium on its 

 summit ; a central and two lateral denticles inside the lip ; 

 ovicell large, granular. 



Dredged at Port Phillip Heads, by Mr. J. B. Wilson and 

 myself. 



