Descriptions of New, or Little Known, Polyzoa. 109 



Trans. 1879, extra vol.), from which it differs only slightly 

 in the size and direction of the avicularia, which in the 

 Kerguelen form are described as large and reclinate, and seem 

 to be very similar to those of B. spinigera, while in the 

 Victorian specimens they are smaller, and pointed more 

 forwards. 



I have already given my reasons for uniting most of the 

 species of Diachovis with Beania, and referring the others 

 elsewhere. 



Family Gemellariid^e. 

 Urceolipora dentata, n. sp. Plate I., fig. 1. 



Cells arranged in a double series facing opposite ways, 

 alternate, elongated, subcylindrical, but narrowed below and 

 projecting in front. Mouth terminal, oblique, lower margin 

 straight, upper semicircular with usually five short, stiff 

 spines. Ovicell large, imbedded in the front of the cell 

 above. 



Port Phillip Heads, dredged by Mr. Wilson and myself. 

 Forms small tufts about an inch high. The cells bear a 

 marked resemblance to those of Galwellia bicornis, although 

 there is not the same peculiar mode of connection. On the 

 lower lip there is on each side a minute mark or pit, and 

 immediately below a small median pore. 



Family FLUSTRirm 

 Cabasea reticulum, Hincks. Plate TV., fig. 2. 



I have received some small fragments from Mr. Wilson 

 which seem referable to the Flustra reticulum of Hincks 

 {Ann. and Mag. Ned. Hist., Aug., 1882). The zoarium is 

 divided into broad, short, ligulate branches. The cells, which 

 are disposed in a single layer, are of large size, rounded above, 

 wider at the middle, and contracted below. The margins are 

 very prominent, and the mouth is small, situated at the 

 upper part. 



In one of the specimens a cell is surmounted by an ovicell, 

 which is rounded^ extending about half way up the cell 

 above. In the same specimen there is a single avicularium 

 which agrees with Hincks' description, and is very peculiar. 

 It replaces a cell and is of the same size. The mandible is 

 very large, rounded above, and convex, fitting closely to the 

 thin margin. The lower part of the avicularian cell, below 



