58 A MONOGRAPH OF THE TERTIARY POLTZOA OF VICTORIA. 



A very small species. Outside the raised tubuliferous portion of the zoceciurn 

 there is a narrow, smooth rim. The tubes of the outer rows are considerably more 

 elevated, and are sometimes pointed so as to resemble inverted funnels. There are 

 frequently several small tubes above the thyrostome, and occasionally on the smooth 

 marginal portion of the zoceciuin. Waters describes a short triangular avicularium 

 as occasionally situated above the thyrostome on one side. It is very closely allied 

 to C. tubulifera, described by Hincks from Port Jackson (A.M.N.H., July, 1881), 

 in which, however, the thyrostome is much larger. Waters records C. tubulifera 

 from Muddy Creek, but it does not occur among my specimens. 



3. C. racliata, Moll. sp. PI. VIII., fig. 9. 



Cribrilina racliata, Hincks, B.M.P., 185 ; Waters, Q.J.G.S., 1882, p. 265 ; id., 

 1885, p. 292 ; McG., P.Z.V., 187. A full list of the many synonyms of this species 

 will be found in Hincks' B.M.P. and Miss Jelly's Catalogue. 



Zooecium encrusting. Zocecia ovate, a series of 7-12 ridges on each side, with 

 intervening perforated grooves, radiating from a median elevated line ; thyrostome 

 rather shallow, arched above, straight below, usually with several spines on the 

 upper margin ; a round pore, sometimes absent, below the lower lip, frequently 

 situated in a separate triangular area ; a few scattered avicularia among the zocecia, 

 with long, narrow, pointed mandibles. Ooecia galeate or globose, with a vertical or 

 oblique keel. 



S.P. ; M.C. A common cosmopolitan species. 



4 C. cornuta, n.sp. PL VIII., figs. 10, 11, 12. 



Zocecia distinct, ovate or subrotund, irregularly arranged, very convex ; ten or 

 twelve ridges on each side radiating from the centre, which has no distinct median 

 line, the intervening grooves with large pores ; thyrostome lofty, arched and 

 expanded above, straight below ; peristome raised on the sides and above, with a 

 stout, pointed process at its lower part on either side, directed upwards and forwards ; 

 an avicularium (usually absent), with a broad obtuse or rounded mandible, project- 

 ing from the summit of the zooecium. 



S.P., M.C, C.B., G. 



The specimens are all small, and most are portions of cylindrical branches. In 

 some specimens the oral processes are not very distinct, and the avicularia exist only 

 on a few of the zocecia. The ridges are occasionally very prominent, the lower edge 

 of the thyrostome (formed by first rib) being then very thick and conspicuous. 



