Zoology.] NATURAL HISTORY OF VICTORIA. [Polyzoa. 



a distance from the margin of the mouth. Ocecia rounded, smooth, the edge usually 

 sculptured. 



Reference. — P. H. MacGillivray, Tr. Roy. Soc. Vict., Oct. 1882. 



Port Phillip Heads. 



This very beautiful species is at once distinguished by the 

 arrangement of the oral spines. The lowest on each side is 

 situated below and to one side of the angle of the mouth, and 

 several others are frequently situated at a little distance from the 

 mouth margin. The edge of the ocecium is frequently sculptured 

 as in Microporella Malusii ; but it is as commonly quite plain. 



Explanation of Figure. 



Plate 138. — Fig. 8, small portion, magnified, showing the arrangement of the oral spines, 

 and an ocecium, which in this specimen has a sculptured edge. 



Plate 138, Fig. 9. 



SCHIZOPORELLA CRYPTOSTOMA (McG.). 



Description. — Zoarium encrusting-. Zocecia indistinct; surface tubercular and 

 glistening-; mouth with a large sinus in the lower lip; 4-6 articulated spines on 

 the margin, the lower on one or both sides frequently larger ; a large conical process 

 rising from the centre of the lower margin of the mouth, and almost entirely 

 concealing the oral sinus. Ocecia large, rounded, prominent, shining, the surface 

 smooth, or with faint, converging lines. Avicularia of two kinds, either small, 

 broad, and situated on a calcareous eminence usually by the side of the mouth, or of 

 great size, with a long, narrow, acute mandible, nearly equalling- the zocecium in 

 length. 



Reference. — P. H. MacGillivray, Tr. Roy. Soc. Vict., Nov. 1884. 



Port Phillip Heads, Mr. J. B. Wilson. 



At first sight this species has a striking resemblance to a Rhyn- 

 clwpora, especially R. longirostris of Hincks, the large avicularia of 

 which are very similar. The formation of the oral process, how- 

 ever, is quite distinct. It is not an outgrowth from the side of the 

 mouth, but is a process springing from the lower margin below 

 the sinus. 



Explanation of Figures. 



Plate 138. — Fig. 9, portion near the edge of the zoarium. Fig. 9a, another portion of the 

 same specimen, showing the large avicularia. 



C 349 ] 



