Zoology.) NATURAL HISTORY OF VICTORIA. [Polyzoa. 



Plate 38, Figs. 1 and 2. 

 LEPRALIA MONOCEROS (Busk). 



Description. — Cells ovate, indistinct, pierced in front by a variable number of 

 large apertures ; mouth arched above, straight below, the lower lip occasionally 

 mucronate. Avicularia scattered by the side of the mouth or between the cells. 

 A large thick articulated vibraculum or spine below the mouth on one side. Ovicell 

 small, roundish, or pyramidal, occasionally surmounted by one or two avicularia. 

 Reference. — Busk, Brit. Mus. Cat., p. 72, t. xciii., 5, 6. 



Queenscliff ; Warrnambool, Mr. H. Watts. 



Explanation of Figures. 



Plate 38. — Fig. 1, natural size. Fig. la, magnified. Fig. lb, portion, more highly mag- 

 nified. Fig. 2, another specimen, natural size. Fig. 2a, ovicell, magnified. 



Plate 38, Fig. 3. 

 LEPRALIA EXCAVATA (P. McG.). 



Description. — Cells immersed, elongated, running in lines; elongated areolae 

 round the margins, leaving a narrow smooth surface in front ; mouth nearly vertical 

 to the plane of the polyzoary, its upper border armed with 4 straight stiff spines, 

 the lower lip with a deep notch, inside the bottom of which is usually a small 

 simple denticle. 



Reference.— P. H. MacGillivray, Trans. Phil. Inst. Vict., 1860. 



Queenscliff, on mussel shell. 



Explanation of Figdkk.-. 



Plate 88. — Fig. 3, natural size. Fig. 3a, magnified. Fig. 3b, small portion, more highly 

 magnified. 



Plate 38, Fig. 4. 

 LEPRALIA VITREA (P. McG.). 



Description. — Cells oval or irregularly diamond-shaped, separated by a raised 

 line ; surface granular ; two short, blunt, hollow processes below the mouth ; mouth 

 lofty, margin slightly thickened, under lip with a shallow sinus. Ovicell round, 

 granular. 



Williamstown. 



Explanation op Figuees. 

 Plate 38. — Fig. 4, natural size. Fig. 4a, magnified. Fig. 4b, more highly magnified. 



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