or Little Known, Polyzoa. 135 



pores ; mouth horse-shoe shaped above, with a large, wide 

 and deep sinus below ; at the junction of the sinus and 

 upper part there is a prominent sharp denticle on each side 

 for the articulation of the operculum ; a small, broadly oval 

 avicularium on a separate punctured area at the base of the 

 cell ; ovicell large, slightly elevated, appressed to the cell 

 above, punctate, and with an avicularium on the summit. 

 Port Phillip Heads, on Eschara mucronata. 



Lepralia longipora, n. sp. Fig. 18. 



Cells much elongated, distinct, arranged in linear series, 

 convex, surface smooth and sparsely punctured ; mouth 

 nearly circular, with the lower lip slightly straighter, margin 

 thickened ; ovicell large, rounded, smooth. 



Port Phillip Heads. 



Smittia oculata, n. sp. Fig. 12. 



Cells elongated, distinct ; surface glassy, thickly covered 

 with slight elevations, which, on deeper focussing, appear as 

 large rounded pores; primary orifice horse-shoe shaped or 

 rounded ; secondary orifice, with the sides very largely 

 raised and a thickening below, on which is a rounded 

 avicularium, and inside a denticle ; ovicell slightly promi- 

 nent, with a slightly raised vertical ridge, on each side of 

 which is a rounded pore, with a slightly thickened margin. 



Port Phillip Heads, Mr. J. B. Wilson. 



The surface of the cell is covered with numerous large, 

 slight elevations, which, in deeper focussing, are shown to 

 be elevated pores, covered by a thin layer. The pores 

 on the ovicells, which are probably of the same nature, 

 are usually two, but occasionally three. It is allied to S. 

 Landsborovii, which, as well as S. trispinosa, is abundant 

 at the Heads. 



Smittia reticulata, var. spathulata. Fig. 14. 



Cells elongated, separated by distinct, raised margins, 

 deeply punctured or areolated round the margins ; mouth 

 rounded in young cells, with three or four spines, the peris- 

 tome in older cells produced on each side, leaving a narrow 

 sinus below, inside of which is a squared denticle, with a 

 smaller one on each side ; a single large, spatulate avicu- 



