8 Proceedings of the Royal Society of Victoria. 



Locality.— CWiton Bank, Muddy Creek. (T. S. Hall). 



The characteristics of this species are the very smooth front 

 and papillose dorsal surfaces. The geminate pair is on the front 

 view somewhat different from the single zocecia, notably in 

 having a greater number of fenestrse (an unusual occurrence) but 

 the dorsal surface showed that it belonged to the same species. 

 I would wish to note that the dorsal surface figured is that of 

 the single zooecium (Fig. 14fl) which was drawn before it was 

 mounted. I afterwards found another and mounted it on the 

 same slide to show the dorsal surface, but it is imperfect, so I 

 have reproduced the drawing of the perfect one. 



Catenicella baccata, n. sp. (PI. II., Figs. 15 and \ba). 



Zocecia elongate. Lateral processes with depressed pedal and 

 infra-avicularian areas. Fenestras 15-17, oval, depressed; not 

 perforated. Thyrostorae arched above, slightly hollow below ; 

 peristome raised, produced upwards as a ridge, and laterally as 

 thickened ridges, at the extremities of which are small avicularia. 

 Dorsal surface coarsely papillose with a small sulcate area. 



Locality. — Mornington. (T. S. Hall). A single geminate 

 pair. 



This is allied, to C. papillata, but is distinguished by being 

 much larger, more elongate, the papillae on the dorsal surface are 

 larger and oval, the front surface is not so smooth and it has 

 lateral ridges with avicularia at the outer ends. The fenestrse 

 are also peculiar, being oval depressions not perforations. 



Catenicella ampliata, n. sp. (PI. II., Figs. 16 and 16<z). 



Zocecia broadly ovate, rather flat in front. Fenestne 11, 

 elongated, pyriform, convex and perforated. Thyrostome lofty, 

 arched above ; sinuous below. Lateral processes very wide and 

 flat, with a very narrow pedal depression. Avicularia at upper 

 angles with large conical flat rostra above. Dorsal surface very 

 much raised longitudinally so that a transverse section of 

 zooecium proper is triangular with rounded corners. 



Z^(r<z//0'.— Mornington. (T. S. Hall). 



The specimen dravvu has the conical rostra perfect, but as the 

 thyrostome is imperfect I have drawn one (Fig. \^a) with the 

 fenestras from another specimen on tlie same slide. 



