18 Froceediii'js of tlte Rof/al Society of Victoria. 



projections (avicularian ?) at the upper angles, l)ut evidently hoc 

 perfect. Thyrostome arched above, curved below ; a depressed 

 mark or slit on each side. Ooecium orbicular, adnate, with a 

 vertical, narrow, pointed, elliptical pore immediately over the 

 centre of the aperture which is arched above but imperfect below ; 

 the surface is quite smooth, but shows numerous small round spots 

 in which the cell wall is very thin. There is a broken portion on 

 one side of the internode which may have been another zocecium. 

 Locality. — Moorabool. (T. S. Hall). A single specimen. 



Caloporella enormis, n. sp. (PI. II., Fig 11). 



Zooecia very large, elongate. Lateral vitta? broad, extending 

 from near the base to the thyrostome, crowded with irregularly- 

 placed pores with somewhat raised margins, not arranged in 

 rows. Thyrostome arched above, slightly constricted near the 

 base ; lower lip protruberant, extending a short distance beyond 

 the sides of the thyrostome. The space between the vitta? 

 elevated, smooth. 



Locality.- — Balcombe Bay, Mornington. (T. S. Hall). 



A single geminate pair. At once distinguished by its enormous 

 size and the broad vitta? crowded with irregularly-placed pores. 



Caloporella rostrata, n. .sp. (PL II., Fig. 12). 



Zooecia wedge-shaped, flat in front, convex behind, with very 

 narrow lateral vittai bearing a single row of pores. Thyrostome 

 semi-elliptical (vertical), with small semicircular sinus in lower 

 lip. Avicularian processes large and conical, projecting like 

 horns. 



Locality. — Muddy Creek. (T. S. Hall). A single specimen. 



It is doubtful whether this ought to be placed in Caloporella 

 or Claviporella. It has a sinus in the lower lip, which none 

 of the Caloporellpe hitherto described have ; this, however, may 

 be the result of an imperfection, and, as it has vitta?, I place 

 it in Caloporella. 



Stpophipor'a bellis, n. sp. (PI. II., Fig. 16). 



A fertile zocecium, with a small (normal T) zooecium at the 

 side. Ooecium ovoid ; the greater part of the front is occupied 



