Zoology.'\ NATUKAX, HISTORY OF VICTORIA. \_Polyzoa. 



Variety lata (McG.). Zooecia broad, flat, smooth except faint 

 ffroovins: at the eda-es. Zooecial pore of moderate size, semilunar. 

 Avicidaria generally situated above the level of the pore, sometimes 

 by the side of the mouth, the long slender mandible mostly directed 

 downwards. Tr. Roy. Soc. Vict., Nov. 1884. 



Variety canalicidata (McG.). Zooecia very calcareous, edges 

 deeply grooved, the intervening divisions and margins very cal- 

 careous ; the grooves converging towards the central part, which 

 is mai-ked otf by a heaped-up calcareous ridge. Zooecial pore ot 

 moderate size, circular. Avicularia large, usually on one side 

 only of the pore, with the mandible directed outwards. In the 

 ooecia the band is smooth and a series of deep grooves, separated 

 by calcareous ridges, converge to the centre, which is raised. In 

 young specimens, the deposition of calcareous matter is very much 

 smaller and the markings proportionately less distinct, but the 

 form as figm*ed is very soon assumed. It is that which I previously 

 described as Lepralia canalicidata, (Plate 37, fig. 4), but an 

 examination of numerous specimens has satisfied me that, however 

 distinct in appearance at first sight, it ought properly to be ranked 

 merely as a variety of M. diadema. Tr. Roy. Soc. Vict., Nov. 

 1884. 



Explanation of Figures. 



Plate 175. — Fig, 2. Microporella diadema, variety lunipuncta. Fig. 3, variety longispina. 

 Fig. 4, variety lata. Fig. 5, variety canalicidata. 



Plate 175, Fig. 6. 

 MICROPORELLA RENIPUNCTA (McG.). 



Description. — Zooecia ovate, distinct, smooth or faintly areolated at the 

 margins; mouth straig-ht below, arched above, with three or four spines; a laro-e 

 reniform, punctate plate, covering a zooecial pore below the mouth. An avicularium, 

 with sharp pointed mandible, situated transversely between the pore and the mouth. 

 Ocecia large, prominent, traversed by a thickened ridge separating an inferior area 

 which is smooth or marked with radiating lines. 



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



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