Tertiary Polyzoa of Victoria. 25 



'because the form of the thyrostome and peristome are better 

 preserved than in those which are encrusting ; in the latter the 

 zooecia are quite distinct from one another, and they have two 

 ribs diverging from the bottom of the scutiform area to the base 

 of the zooecia, and the triangular space enclosed by them is 

 slightly concave. The structure of the scutiform area is very 

 similar to that of the front wall of Membraniporella or of 

 some Catenicellidae. 



Lekythopopa mooraboolensis, n. sp. (PL II., Fig. 18). 



Zoarium glomerate. Zooecia orbicular or subcorneal; surface 

 granulated. Thyrostome with a long tubular peristome, with a 

 small tubular avicularian process adherent to it ; aperture of 

 peristome oval with a small mucro (?) projecting inwards. 

 Primary orifice too far down the peristomial tube to be visible. 



Z^^rt///}'.— Moorabool (T. S. Hall). 



A single specimen of three or four zooecia. The granulated 

 surface of the zooecia is yellowish, owing to iron stain, but the 

 peristomial tube is white and semitranslucent. The mucro seen 

 in the aperture of the peristome is probably the projecting side 

 of the avicularian tube. 



Lekythopopa kitsoni, n. sp. (PI. II., Fig. 19). 



Zoai'ium ligulate, with zooecia on both faces. Zooecia flask- 

 :shaped, with a circular depressed area in front. Thyrostome 

 small, orbicular, with a thickened rim or margin. 



Localities. — Waurn Ponds (T. S. Hall) ; Darriman (A. E. 

 Kitson). 



This .species is plentiful in the Waurn Ponds deposit, and I 

 had assumed it was peculiar to it, but recently I found a few 

 specimens in the Darriman deposit. All of them present a 

 granular or subcrystalline appearance under the microscope, 

 rendering it very difficult to be sure of their structure, but it is 

 evidently a Lekythopora. Many of the specimens are somewhat 

 worn, and look something like Adeona clavata in a bad state of 

 preservation, and probably it has been taken for that species. 



