10 Proceedings of .the Royal Society of Victoria. 



Costaticella lineata, McG. 

 Catenicella lineata, McG. Monograph, p. 14, pi. i., fig. 30. 



Costaticella escharoides, n. sp. (PI. I., Fig. 13). 



Zooecia elongated, oval, flat ; lateral processes wide, with supra- 

 and infra- avicularian and pedal chambers. The central area is 

 flat and composed of many (22 or more) narrrow, cOnvex ribs, 

 imperforate, but small fissures are present which may be the 

 result of attrition ; the median line, on which the ribs abut, is 

 zigzag. 



Locality. — Mornington. (T. S. Hall). 



This is allied to C. lineata but the fenestral ribs are not 

 perforated at the ends as in that species, and the lateral processes 

 are very wide ; unfortunately they are imperfect, the outer 

 portions being broken. 



Strophipopa excavata, n. sp. (PI. II., Fig. 20 and 20a). 



Zooecia small, somewhat quadrate. Thyrostome suborbicular ; 

 a raised band extending from the base of the zocecium to the 

 thyrostome, with a median oval depression in the upper part ; 

 depressed areas on each side with 2*3 pores. Avicularia at 

 upper angles. Dorsal surface with much depressed areas on each 

 side of the zooecia. 



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



This differs from S. harveyi in its smaller size and the deep 

 wide depression on the dorsal surface leaving a broad raised 

 median portion at the rear of each zoojcium and not a narrow 

 linear ridge. 



Strophipopa sulcata, n. sp. (PI. II., Figs. 21 and 1\a). 



Zooecia ovoid, front with a I'aised broad band in the centre, 

 with a depressed area on each side in which are 2 -3 perforations. 

 Thyrostome arched above, imperfect below, wide lateral processes 

 above the thyrostome with avicularia at outer angles. Doi'sal 

 surface smooth, with a narrow, deep furrow on each side. 



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

 single specimen. 



