16 Proceed inf/)^ of the Royal Societj of Victoria. 



Catenicella dsedala, McG. (PL I., Figs. 4 and 5). 



Dr. Macgillivray mentions only gemiuatf pair.s of this species. 

 I have found single zocecia. 



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



tioine of my specimens are evidently in a more perfect state 

 than the one figured in the Monograph (PI. 1., Fig. 28), the 

 avicularium being clearly defined, and apparently with the 

 mandible ifi situ. The ridges between the infra-avicularian and 

 pedal depressions and around the fenestrate area are very 

 prominent. An outline (Fig. 5) is given to show the great 

 dorsal rotundity. 



Catenicella elegantlssima, n. .sp. (PL I., Fig. 6). 



Primary and lateral zocecia ovate, with 5-7 fenestras in a 

 scutiform area ; lateral processes wide. In the upper zocecium 

 there is a ridge extending upwards from the thyrostome, with 

 two branches at right angles to it ; thyrostome arched above, 

 straight below ; there is a small round pore below each lower 

 angle, and between them a small semicircular elevation. In the 

 lateral zocecium the thyrostome is arched above, nearly straight 

 below, with the upper part of the peristome slightly raised ; a 

 ridge extends upwards and branches similar to, but not exactly 

 like, that in the upper zocecium. The ooecium is adnate to the 

 zooecia (a condition rarely found in true Catenicellse) ; it is large, 

 ovate, with two large depressed, granulated areas, separated by a 

 vertical ridge. 



Locality.— BaXcomhe Bay, Mornington. (T. S. Hall). 



Tliis is a most interesting specimen, as it consists of three 

 zocecia and an ooecium in one internode. It and C. porosa (McG.) 

 form a new and distinct type of the genus Catenicella as defined 

 by Dr. MacGillivray. I have only seen one specimen. 



Caloporella grandis, n. sp. (PL I., Fig. 7). 



ZoiL'cia elongated, obconical, with broad vittte having two 

 rows of pores. Thyrostome lofty, arched above. Lower lip 

 slightly curved. Avicularian processes large, with arched 

 rostrum. 



