Tertiary Folyzoa of Vivtorid. 15 



conjoined to, normal cells ; consequently, I have been enaljled to 

 assign two of those I have found to species already described. 

 The type specimens will be deposited in the National Museum. 



Catenicella orbicularis, n. sp. (Pi. I., Fig. 1). 



Zocecium very large, orbicular, the front slightly flattened, 

 occupied with a series of large, irregularly shaped, tubular 

 fenestras diverging from a central line to the margin, mostly 

 bi'oken away, and separated by shallow grooves. Lateral 

 processes small, with a large avicularium at each upper angle of 

 the zocecium and a narrow long infra-avicularian depression. 

 Thyrostome arched above, slightly curved below. 



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



I have found only one specimen of this species ; it is allied 

 to C. /atifrons, but is at once distinguished therefrom by its large 

 size and nearly spherical shape. 



Catenicella macgillivrayi, n. sp. (PL I., Fig. 2). 



Zocecium (fertile only found) small, semi-globose, with seven 

 small fenestrse ; lateral area broad, smooth, with an extension at 

 one upper angle, which may be avicularian. Ocecium oval, with 

 a slightly depressed falciform, granular area in each side. Ooecial 

 aperture semicircular above ; lower lijD sinuous, with a small sinus 

 in the middle. There is a projecting tube above the ooecium, 

 which possibly may have borne an avicularium. 



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



This species and the next are of the usual type of ooecia of 

 Catenicella^, of which none have hitherto been found fo.ssil. 



Catenicella spenceri, n. sp. (PL L, Fig. 3). 



Zocecium (fertile only found) broad, subtriangular with four 

 fenestras. Lateral processes wide. Ooecial aperture very broad, 

 semicircular above ; lower lip wide, sinuous, having a shallow 

 sinus in the centre. Oojcium large, oval, with two large, renifoi-m 

 depressed areas, with raised upper margins on the front ; above 

 the ocecium is a plate with two perforations, which is not perfect ; 

 it was accidentally broken in the mounting, one perforation only 

 is left. 



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



