■238 C. M. Maplestone: 



Locality, Filter Quarries (T. S. Hall). 



Tliis species occurs as lon<r slender branches, and has very few 

 zooecia in the whorls, which are very irregular. 



Entalaphora quad rata, n. sp. (PL VIII., Fig. 18). 



Zoarium robust. The whorls are composed of fo\ir zooecia in 

 alternate series, 0.6 mm. apart, but the zooecia are 1.2 mm. lonof, 

 0.1 to 0.17 mm. wide; the front surface is flat, with raised 

 marginal ridges ; they are slightly exserted at the distal end, 

 and the peristomes are thickened. 



Locality, Filter Quarries (T. S. Hall). 



This species has the zooecia very much elongated, and only 

 four in a whorl. 



Entalophopa aipensis, n. sp. (PI. VIIL, Fig. 19). 



Zoarium verj' slender. Zooecia vei*y long, 0.7 to 1 mm. ; 0.07 

 to 0.15 mm. wide, in irregular order ; distal portion curved nut- 

 wards, with a thickened peristome. 



Locality, Aire Coastal beds (Messrs. Hall and Pritchard). 



This is a veiy slender species, the zooecia are very long, and 

 they have a thickened peristome. 



Berenicea nitida, n. sp. (PI. VTIL, Fig. 20). 



Zoarium adherent. Zooecia almost totally immersed ; thyros- 

 tome small, 0.025 mm. in diameter, slightly exserted. 



Locality, Filter Quarries (T. S. Hall). 



A single specimen about 4 mm. in diameter. The zooecia 

 are irreguarly disposed, but here and there they are in linear 

 order, and at practically the same distance (0.1 mm.) ft-om one 

 another. 



This genus has not hitherto been recorded as occurring in our 

 Tertiary formations. 



EXPLANATION OF PLATE. 



Fig. 1 — Crisia acuta. x 48/2. 



2 — Idmonea elongata. x 48/2. 



3 — Idmonea delicatissima. x 48/2. 



4 — Idmonea parvula. x 48/2. 



