272 C. M. Ilaplestone : 



them, broken off, leaving a portion of the tubular stem exposed, 

 but one on the left-hand side is preserved. The basal wall of 

 an ooecium is seen above the distal end of the aperture of 

 uppermost median zooecium. The specimen is not in very 

 good condition, portions of it being obscured by sandy particles, 

 but there is no doubt as to its specific distinction. 



Fapcimia airensis, n. sp. (PI. XL., Fig. 16). 



Zoarium erect, free. Zooecia long and narrow, with raised 

 m.argins. Aperture elongated, oval ; sides straight ; ends curved, 

 proximal end narrower than the distal one ; margins raised. 

 Numerous large spatulate avicularia on one side of the zoariimi. 



Locality. — Aire River, Cape Otway (Dr. Hall). 



This is near F. lusoria, Waters, but the zooecia are longer 

 and narrower, and the large spatulate avicularia are peculiar to 

 it. 



Menipea uniserialis, n. sp. (PI. XL., Fig. 17). 



Zoarium erect ; the zooecia in single series. Zooecia oval 

 with large elliptical aperture, which at the distal end bears, below 

 the level of the margin, a median broad process leaving a 

 narrow space on each side ; the inner lateral and proximal 

 margins of aperture granulated ; a very small spine on one side 

 of the margin near the distal end ; a very large sessile avicu- 

 larium on the other side of the zooecia. 



Locality. — Aire coastal beds (Dr. Hall). 



This species I assign to Menipea, though the zooecia are in 

 single series, instead of the usual bi- or multisei'ial series, as it 

 has a large sessile avicularium on one side of the zooecia. 



Synaptacellidae, nov. fam. 



Zoaria free, rigid. Zooecia in single series. 



The zoarial character of the species I have placed in this family 

 is quite distinct from that of the other families in which the zooecia 

 are in single series. In Catenicellidae the zooecia are joined together 

 by tlexible chitinous tubes. In Eucratiidae they are only some- 

 times uniserial, and are subcalcareous, not rigidlv connected. 



