Australian Polyzoa, 133 



The cells are quite unchstinguishable. They are pierced by 

 several large openings. The mouth is very large, and usually 

 has on one side two or three sharp denticles. The lower lip 

 forms a large projecting mucro hollowed on one side for an 

 avicularium, and round on the other, from which also fre- 

 quently projects a mamilliform process. The avicularium 

 faces that side of the cell mouth on which the sharp 

 denticles are situated. In some specimens there are two or 

 three short rounded processes on the upper lip. 



L. mucro7iata. 



Cells elongated, of small size, in radiating series. A single 

 median avicularium below the mouth, situated on a pro- 

 jecting mucro, mandible on the anterior surface, pointing 

 directly upwards. A stellate pore in the middle of the cell. 



Queenscliff, on shell. 



This species is at once distinguished by the central, stellate 

 pore, and by the suboral avicularium. The cells are long, 

 narrow, arranged in radiating series, which are separated by 

 furrows, in the bottom of which can sometimes be distin- 

 guished a narrow raised line ; sometimes the extreme margins 

 are areolated. The front of the cell is finely granular or 

 frosted ; about or below the middle is always a large, round, 

 stellate pore. Immediately below the mouth is a median 

 avicularium, the fixed part of which forms a mucro pro- 

 jecting beyond the lower lip, and the mandible of which is 

 pointed directly upwards and opens in front. 



L. diadema. 



Cells broad ; mouth straight below, arched above, with 

 several spines ; a central, roundish pore below the mouth ; 

 the edges of the cell obscurely grooved. An avicularium on 

 each side below the mouth, mandible long and pointed out- 

 wards ; sometimes an avicularium only on one side. Ovicell 

 encroaching on the cell above, with a broad band of vertical 

 beaded lines round the upper margin. 



On algse, Will iamst own and other places. 



L. ceramia. 



Cells obscurely rhomboid or hexagonal, areolated in front ; 

 mouth arched above, with three or four spines, straight below ; 

 a lunate pore in front below the mouth. A large avicularium 

 at one side of the mouth, mandible long, pointed, directed 

 downwards. Ovicell imbedded in the cell above, sculptured 

 round the upper margin. 



