Tertlarii Poli/zo<i of Victoria. 2135 



Idmonea morningtoniensis, n. sj). (PI. VIT., Fig. 8.) 



Zoarium ligulate, bniad. Zooecia in a more or less refrular series 

 of two, three or four, diverging from the central line ; distal 

 part cm-ved forwards ; length of zooecia 0.3 to 0.4 nmi. ; 

 width, 0.07 to 0.17. Thyrostome 0.05 to 0.1 mm. in diameter. 



Locality, Moniington (T. S. Hall). 



This species is near 7. uitu, McG., but there are fewer znoecia 

 in each row, and they are only about half the siize, and not so 

 connate as in that species. 



Filisparsa concinna, n. sp. (PI. VIT., Fig. 9). 



Znurium branching, 0.6 mm. wide. Zooecia in quincunx order, 

 imniei'sed, with long tubular peristomes, 0.2 to 0.4 mm. long, 

 the immers.ed portion nf the zooecia with a flat surface and 

 raised margins. 



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



This is a very peculiar form. I have placed it in F'disparsa, 

 as the zooecia are irregularly arranged on the w'hole ; in the 

 central portion of the zoarium they are all in fairly regular 

 quincunx order, ?jut the marginal zooecia are very irregular, 

 and the distal portion protrudes at almost a right angle to the 

 surface, to a distance of 0.2 to 0.4 mm. The peristomes of 

 the central zooecia are evidently imperfect. The margins of the 

 immersed portion of the zooecia are raised, forming ridges, which 

 is a verA' peculiar characteristic, and not present in any other 

 species of the genus. 



(?) Diastopopa dennanti, n. sp. (Pi. YIl., Fig. 10). 



Zoarium broadly Ligulate, sui'face nearly flat. Zooecia immersed, 

 very slightly exserted at distal end. Thyrostomes transversely 

 elliptical, 0.15 mm. broad, with a small lenticular cavity just 

 inside the proximal margin. Thyrostomes 0.2 mm. apart, but 

 the zooecia are in quincunx order, and are probably 0.5 mm. 

 long. 



Locality, Mitchell River (J. Dennant). 



This is a very peculiar form, as it sho^vs a lenticular cavity 

 just within the proximal mai'gin of the thyrostome, -which may 

 indicate the locality of an avicularium ; though so far as I know 



