Tertiary Polyzoa of Victoria. 279 



Locality. — Mornington (Dr. Hall). 



This is a small fragment, apparently of vincularian form, not 

 very well preserved, but quite distinct from the other species. 

 The '■ B " zooecia are very much larger than the " A " zooecia, 

 which latter are much narrower than those of the other species 

 described. The polypide tube shows as a hemispherical cup on a 

 level with the cryptocyst, and there is no indication of its con- 

 nection with the basal wall. 



Thalamopopella airensis, n. sp. (PI. XLV., Fig. .32). 



Zoarium in vincularian form. Zooecia elongate, narrow : mar- 

 gins raised ; distal end arched, occasionally pointed. Thyrostome 

 arched above, projecting foi'ward ; slightly curved below. Avi- 

 cularia acute. Ooecia (?) cup-shaped. 



Locality : — Aire coastal beds (Dr. Hall). 



This is a very narrow celled species, and the zooecia vary a 

 good deal in form and size, some are curved distally, and some, 

 more or less pointed. The avicularium, at the top of the speci- 

 men, bears a long, apparently cylindrical, process distally, but 

 it is not very well preserved. On one zooecium on the right- 

 hand side is a cup-shaped process, which is probably the basal 

 part, of an ooecium. 



Thalamopopella dennanti, n. sp. (PI. XLVI., Fig. 33). 



Zoarium encrusting, tlat. Zooecia longitudinally disposed, in 

 straight lines : margins very thin, raised. Cryptocyst flat ; sur- 

 face with a few small scattered pores, chiefly on the lateral 

 margins. Thyrostome arched distally, with very thin upper 

 margin : proximal margin curved and rounded. Ooecia globose, 

 superimposed on the distal zooecia ; basal wall with a large 

 central foramen and a small elliptical one on each side. 



Locality. — Mitchell River (J. Dennant). 



In this species the lateral margins of the zooecia are very 

 thin, and project above the flat cryptocyst : the margins of the 

 thyrostomes are raised, the distal having a thin edge ; the 

 proximal one is rounded, and where it is broken is seen to be 

 hollow. Only the basal walls of the ooecia are preserved, show- 

 ing them to be probably globose. 



