10 A MONOGRAPH OF THE TERTIARY POLYZOA OP VICTORIA. 



small distinct suboral pore ; lateral processes pointed above. Posterior surface 

 convex. 



S.P.; M.C.; B.R and W.P. (W.) 



Mr. Waters gives no figure. His description is : — " Globulus ovate, with a row 

 of large foramina round the margin of the zocecium, and one pore below the aperture. 

 Aperture large, rounded above, widest at the proximal end, which is straight. Oral 

 aperture 0'08 millim. wide and 0*08 millim. long." I have only single zocecia of this 

 species. 



5. C. expansa, n.sp. PI. I., figs. 8, 9. 



Zocecia broadly ovate, fenestra? 9 in single, 6 or 7 in geminate zocecia ; thyrostome 

 with the lower margin straight and a small suboral pore ; lateral processes very 

 broad, triangular, extending the whole length of the zocecia and curved forwards, 

 with a small avicularium at the angle, opening outwards. Posterior surface convex, 

 finely sulcate. 



M.C. 



Allied to C. circumcincta, from which it differs in the greater width of the 

 zocecia and the large size of the wing-like lateral processes. 



6. C. mamillata, n.sp. PI. I., figs. 10, 11. 



Zocecia ovate; fenestra? 12-16, round, sub-marginal, extending to each side of 

 the thyrostome ; thyrostome lofty, with the peristome projecting above, slightly 

 wider at the inferior angles, lower margin straight and entire ; a small suboral 

 pore ; anterior surface convex and the geminate zocecia, especially the upper, with a 

 large mound-like elevation marked by several fine lines radiating from the suboral 

 pore ; lateral processes of moderate size. Posterior surface depressed. 



S.P.; M.C. 



Most of my specimens consist of geminate pairs of zocecia. In these the mound- 

 like striated elevation forms a marked feature ; in the single zocecia it is not nearly 

 so prominent, but the front is more convex than in C. circumcincta, The posterior 

 surface is slightly depressed. 



7. C. tenuis, n.sp. PI. I., figs. 12, 13, 14. 



Zocecia slender, elongated, convex, usually curved with the concavity forwards ; 

 a sub-marginal row of 11-15 large, round fenestras ; thyrostome lofty, straight below, 

 and with a minute denticle above each lower angle ; peristome slightly elevated ; 

 lateral processes broad and pointed above, and having an avicularium opposite the 

 middle of the thyrostome. 



S.P.; MC. 



