or Little Known, Folyzoa. 69 



•when one is developed. In G. acantJioceros, the spine, 

 besides being very long, and furnished with the peculiar 

 armature, is situated below the lower lip, and if a peristome 

 should be developed (which I have never seen) would be 

 outside it. 



Family Escharid^. 

 Porella formosa, n. sp. Plate IL, fig. 6. 



Zoarium encrusting or adnate. Zooecia pyriform or elong- 

 ated, separated by distinct raised margins; surface with a 

 row of large areolas around the margin; primary mouth 

 slightly hollowed below; secondary enclosing inferiorily an 

 avicularium, with a nearly semicircular mandible resting on 

 a pouch-like elevation of the zooecium; no internal denticle; 

 a minute articular process on each side of the mouth for the 

 attachment of the operculum. Ooecia large, galeate, promi- 

 nent, margined by a thickened rim, and closely punctate. 

 , .^Queenscliff. 



' ■ Allied to P. concinna, but difFerino^ in the absence of an 

 internal denticle and in the presence of a small articular 

 process on each side of the mouth for the attachment of the 

 operculum. This structure is not visible unless where the 

 operculum has been detached or removed. 



Schizoporella Woosteri, n. sp. PJate II., fig. 5. 



Zooecia broad, subquadrate, separated by distinct raised 

 margins, surface granulated ; mouth suborbicular, with a 

 wide, rounded sinus below. An avicularium, with semi- 

 circular mandible on each side of the mouth at the upper 

 angles of the zooecia. 



Queenscliff', Mr. Wooster. 



Smittia calceolus, n. sp. Plate II., fig. 8. 



Zoarium encrusting or adnate. Zooecia much elongated? 

 narrow, separated by narrow (sometimes indistinct) raised 

 lines ; surface rough or granular, a row of deep, rounded 

 areolations along the margins ; mouth broadly triangular, 

 the peristome much elevated and produced into a point on 

 each side, leaving a narrow^ spout-like channel below ; a 

 broad, hammer-shaped denticle internally; immediately 

 below the mouth an avicularium with a long, narrow 

 mandible directed straight downwards. Ooecia partly im- 

 mersed in the cell above, elongated and rounded above, 

 depressed across the middle portion, thickly punctate. 



