Zooloyy.l NATURAL HISTORY OF VICTORIA. [Polyzoa. 



Plate 186, Fig. 6. 

 SCHIZOPORELLA PACHNOIDES (McG.) 



Description. — Zoariiim encnistin"-. Zooeoia elongated, irreg-iilar in shape, 

 separated bj' distinct g'l-ooves with an elevated line at the bottom ; surface covered 

 with small elevations, or, from the opening of these, white-bordered pores ; mouth 

 lofty, horse-shoe shaped, with a wide, deep sinus in the lower lip ; margin thickened, 

 especially below; upper border becoming thickened and raised with age. An 

 avicularium, with the triangular mandible pointed straight or obliquely downward's, 

 on a slight elevation below the mouth. Ooecia of moderate size, rounded, finely 

 granular. 



Reference. — P. H. MacGillivray, Tr. Roy. Soc. Vict, Nov., 1886. 

 Port Phillip Heads. 



Explanation of Fiouees. 

 Plate 186. — Fig. 6, group of zooecia, maguified. Fig. 6a, single zooecium. 



Plate 186, Figs. 7-9. 

 SCHIZOPORELLA HYALINA (Linn. sp.). 



Description. — Zoarium thin and silvery. Zooecia in more or less radiating 

 lines, closely united or separated by punctures, elongated, smooth, or transversely 

 rugose; mouth subcircular, lower lip entire or with a sinus. Ooecia large, globose, 

 smooth, vertically carinate, or umbouate, or granular, or perforated. 



References. — ScJiizoporella hyalina, Hincks, Brit. Mar. Pol., p. 271, jil. xviii., 

 figs. 8-10; pi. xlv., fig. 2. Lepralia hyalina, Busk, Brit. Mus. Cat. Mar. Pol. 

 pt. ii., p. 84 ; pis. Ixxsii., xcv., ci. 



On algae, sliells, and stones, common. 



This cosmopolitan species usnally occurs in small circular 

 colonies on algaj or shells. The zooecia are thin and hyaline, 

 arranged in irregularly radiating lines, either closely united or 

 separated by intervening perforated spaces, the parts between the 

 perforations being hollow or tubular. They are generally much 



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