2S0 Rev. T. Ilincks's Contrlhations towards a 



throughout, disposed in linear series ; front wall epressed, 

 almost flat, rising slightly towards the orifice, sutures little 

 more than incised lines ; surface smooth, of greyish colour, 

 covered with punctures, which are commonly almost con- 

 cealed by a shining membranous epidermis ; orifice nearly 

 circular (somewhat drawn out transversely) ; peristome very 

 slightly thickened and raised, unarmed, forming a delicate 

 rim. Avicularia none. Ooecium large, rounded, promi- 

 nent, somewhat produced lengthways ; surface punctured and 

 roughened, glossy, the punctures often almost obliterated. 



Zoarium of very delicate texture, forming a greyish glossy 

 crust, on the flat surface of which the orifices show as slight 

 elevations. 



Loc. Port Phillip Heads {J. B. Wilson). 



In this species the structure is perfectly simi)le ; there are 

 no ap])endages. The orifice is all but circular, Avithout sinus 

 or secondary opening. It seems entitled to stand as the type 

 of a new group. 



Family Myriozoidse (part.), Smitt. 



SCHIZOPORELLA, Hincks. 



ScMzoporella subsinuata, n. sp. (PI. VIII. fig. 1.) 



Zoarium incrusting, of a dark greyish colour. Zoo'cia 

 ovate, quincuncial, bounded by raised lines, moderately con- 

 vex, rising considerably towards the oral region (frequently a 

 prominent nodulated boss immediately below the orifice), de- 

 pressed below ; surface thickly punctured and roughened by 

 many nodules ; orifice arched above, broader than high, lower 

 margin straight, with a very minute central notch- like sinus j 

 operculum of a dark reddish colour. Avicularia none. 

 Ooecium. large and massive, covering great part of the cell 

 above, rounded, prominent, with the surface roughened and 

 punctured. 



The zoo2cia are often invested with a thin papyraceous 

 covering. 



Loc. Port Phillip Heads (/. B. Wilson). 



8cMzo2)orella hiturrita^ n. sp. (PI. IX. fig. 8.) 



Zooecia ovate, boundaries indistinct, very moderately con- 

 vex, depressed towards the base, quincuncially arranged ; 

 surface thickly covered with rather large punctures, and with 

 nodular risings amongst them, usually invested by a smooth 

 and dense covering, which conceals the pores, the nodules 

 only showing faintly through it ; orifice much taller than 

 broad, arched above, the lower margin, with the exception of 



