Zoology.] NATURAL HISTORY OF VICTORIA. [Pohjzoa. 



Plate IOC, Fig. 2. 



AMPHIBLESTRUM FLEMINGII (Busk). 



Description. — Zocecia large, variously shaped, surface granular ; inner aperture 

 large, obscurely trifoliate; a spine on each side. A sessile avicularium at the base 

 of a zocecium, with the mandible directed upwards or laterally. Ocecia large, 

 prominent. 



References. — Busk, Cat. Mar. Pol. Brit. Mus , pt. ii., p. 58, pi. lxxxiv., fig's. 

 3-0 ; Ilincks, Brit. Mar. Polyzoa, p. 162, pi. xxi., figs. 1-3. 



Fort Phillip Heads, dredged by Mr. J. B. Wilson and myself. 



I have only seen two small fragments of this species, hut I 

 have no doubt that it is identical with M. Flemingii, although 

 differing in size and appearance of the ooecia from those of the only 

 European specimen I have. In the Victorian specimens the 

 zocecium is generally produced below the margin, and it is in this 

 part that the avicularium is situated. The mandible is usually 

 pointed directly upwards, but it is occasionally transverse to 

 the zocecium. In the European form there are generally two 

 avicularia at the base of a zooecium. In my specimens most of 

 the zocecia are destitute of spines, and when present there is only 

 one on each side. The ooecia are very large, some with a space 

 marked off in front, but most without any differentiation. 



Explanation of Figure. 

 Flatio 100. — Fig. 2, portion of specimen, magnified, showing' ovicells ami avicularia. 



Plate 100, Fig. 3. 



AMPHIBLESTRUM PERMUNITUM (Hincks). 



Description. — Zoarium very cnlcareous. Zooccia variously shaped, wider in 

 the middle, separated hy raised, crenulated margins ; secondary aperture occupying - 

 nearly half of the front of the zooccia, somewhat fpindrate, hut wider below; front of 

 zocecium helow the secondary aperture porcellanous, finely tuhercular and crenulated 

 at the edge. Avicularia on special tracts at the hase of smaller zocecia; mandihle 

 falcate, with an expanded hase, directed obliquely upwards. Ocecia small, prominent, 

 finely granular, with a crescentic smooth hand about the junction of the upper with 

 the middle third. 



Reference.— Mcmbranipora permunita, Hincks, Ann. and Mns\ Nat. Hist., 

 Feb. 1881. P P > > 



Port Phillip Heads ; Portland, Mr. Maplestone. 



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