Zoology.'] NATURAL HISTORY OF VICTORIA. [Polyzoa. 



Plate 138, Fig. 3. 



SCHIZOPORELLA TRIANGULA (Hincks). 



Description. — Zooecia large, quadrate, flat, separated by slightly raised mar- 

 gins ; surface roughly granular and frequently with minute perforations; mouth 

 wide, slightly arched above, with a wide sinus in the lower lip, at each angle of 

 which is a small articular process. A large sessile avicularium immediately below 

 the mouth, with the long, narrow mandible pointed directly downwards. 



Reference. — Hincks, Ann. and Mag. Nat. Hist., July 1881 ; Busk, Challenger 

 Polyzoa, p. 167. 



Port Phillip Heads. 



This is a very marked species. The zooecia are large, usually 

 quadrate and arranged in radiating linear series, but sometimes 

 oval and very irregular. The broad, shallow, sub-triangular 

 mouth, and the large sub-oral avicularium with its long mandible 

 directed straight downwards, are sufficiently distinctive. I have 

 not seen the ocecia, which, according to Hincks and Busk, seem 

 very peculiar. The description given by Mr. Hincks is — "Ooecium 

 very large, covering almost the whole of the cell above it, rounded, 

 often traversed by raised white lines, with one or more projecting 

 pointed processes on each side in front, overhanging the opening, 

 and opposite to them on the lower margin two (sometimes more) 

 strong conical teeth ; surface covered with large nodules and 

 punctured ; orifice of the ovicelligerous cells very large, elongated 

 transversely, with a slightly sinuated lower margin." 



Explanation of Figure. 

 Plate 138. — Fig. 3, small portion of specimen, magnified. 



Plate 138, Fig. 4. 



SCHIZOPORELLA DMDALk (McG.). 



Description. — Zooecia large, quincuncial, indistinct; surface deeply areolated; 

 mouth semicircular, or rather higher than wide, nearly straight below, and with a 

 deep, rounded sinus ; four or five spines above. A very large avicularium on one or 

 both sides, situated below and outside the mouth, with the mandible extending 



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