72 Proceedings of the Royal Society of Victoria. 



raised borders. Thyrostome oval, or subquadrate, higher tlian 

 ■wide, with an anvil-shaped process growing in a jaroximal direc- 

 tion from the distal margin. 



Locality. — Spring Creek (T. S. Hall). 



This species is at once recognised by the peculiar anvil-shaped 

 process projecting from the distal end over the thyrostome. In 

 the lai'ger form, with the hexagonal zooecia, there is a very large 

 opening above the thyrostome ; these openings are probably 

 ovarian pores of a similar character as, but much larger than, 

 those of C. ciicullata, McG., their occurrence on the larger form 

 only supports this opinion. 



Fig. \lb is an end view of an internode showing three pores 

 through which the chitinous connecting coi'ds passed. 



Cellapia pobusta, n. sp. (PI. IX., Fig. 18). 



Zoarium robust. Zooecia large and broad, somewhat diamond- 

 shaped or hexagonal with angles at distal and proximal ends ; 

 margins raised and curved so that the sides often do not show 

 any lateral angles. Thyrostome suborbicular with two small 

 denticles projecting from the proximal margin, and a plate 

 .showing two small denticles pi'ojecting from the distal margin. 

 Avicularian cell with aperture arched aliove ; lower margin 

 incurved. 



Locality. — Spring Creek (T. S. Hall). 



Of this species I have found only a few small fragments. The 

 avicularian cell has an opening very little larger than the thyros- 

 tome of the zooecia, and might be mistaken for one, but it has no 

 <Ienticles, and has an incurved lower margin ; there is a small 

 hemispherical umbo above it. 



Micpopopa capinata, Maplestone. (PI. IX., Fig. 19). 



This species was described by me in my last paper.^ I have 

 since found a specimen bearing ooecia, which I now tigure. 

 They are large, globose, broader towards the distal end ; smooth, 

 with four small clefts on the distal border. 



Locality. — Mitchell River (J. Dennant). 



1 Proc. Roy. Soc. Vic, vol. xiii., pt. ii., p. 207. 



