X8 A MONOGKAl'Il OF THE TEKTIAKY POLYZOA OF VICTOllIA. 



pair; Uiyrostome with a thiekcMicd peristome and a deiiliele on eacli side; a sligliMy 

 pointed lateral process on cacli side bearing an oval, elliptical or triangnlar 

 avicularium directed forwards or outwards. Posterior surface with a simple 

 vertical raised band similar to that on tlic front. 



Var. porosa. A scries of pores on each side of the raised baud in front. 



^'ar. lata. Distinguished by its much greater Avidth. 



S.P.; iNLC; 13.; AV.P. and B.U. (W.) Dredged iu Bass's Straits by Professor 

 liarvey, but, so far as I know, not since found living. 



Microstomaria, //.//. 



Zoopcia small, without I'euestnc or vittic ; thyrostome small, nearly circular 

 and j)rojecting forwards. 



1. 31. tuhulifera, n.sp. PI. II., fig. 29. 



The only specimen I have seen is the single geminate pair of zooecia figured. 

 The zooecia are very small, narrow, the surface with very minute perforated 

 papilhe and faintly corrugated; each outer angle is produced into a delicate 

 tubular process open at the extremity; there are no avicularia ; the thyrostome 

 is circular and almost tubular from the elevation of the peristome. 



M.C. 



The diiferencc in tlu^ form of the thyrostome necessitates the formation of 

 anew genus for lliis niinule species. It is possible that the tubular processes are 

 reaUy avicidarian. 



Caloporella, n.y. 



Zocccia small, mostly narrow and elongated ; a lateral or anterior usually 

 linear depression (vitta oi' Ikisk) on each side, witli a single or double series of 

 pores; thyrostome small, subcircular or with tiie lower margin straighter and 

 usually having a small denticle on either side. 



I propose this genus for the Catenicellte vittatyc of Busk. It differs from 

 Catenicella in tiic zoo'cia l)eing small and usually narrow, in the absence of 

 fenestrai and the presence of linear lateral narrow depressions usually perforated 

 l)y pores, and in the smaller size and more circular t'orm of the thyrostome. 



1. C. insignis, n.sp. PI. II., figs. 13, 14. 



Zooecia somewhat cuneate; convex and snuwth in i'ront ; vittie generally 

 narrow, but occasionally broader, lateral and extending the whole length; 



