A MONOGRAPH OF THE TERTIARY POLYZOA OF VICTORIA. 123 



strongly punctate. Dorsal surface longitudinally sulcate, with narrow punctate 

 ridges between the sulci. 



S.P. ; M.C. ; Belmont. 



7. /. serialis, Stol. Plate XVI., fig. 20. 



/. serialis, Stol., Foss. Bryoz. Orakei Bay, p. 118. 



Zoarium dichotomously branched ; 1n-anches triagonal in section. Zowcia in 

 alternate series of five, much elongated, distinct throughout, punctate. Dorsal 

 surface slightly convex, longitudinally sulcate, with j^unctatc ridges between the 

 sulci. 



M.C. 



Very doubtfully distinguished from the last, fx'om Avhich it differs in the more 

 numerous and narrower zooecia and the finer punctation. 



8. /. mciirva, n.sp. PL XVL, fig. 19. 



Zoarium dichotomously divided ; branches somewhat triagonal in section. 

 Zooecia in transverse scries of about three, long, narrow, distinct throughout, 

 anterior extremities sharply curved forwards and united up to the elliptical thyro- 

 stomes. Dorsal surface with narrow,- continuous, longitudiual ridges, with distinct 

 intervening sulci similar to those separating the zoa3cia in front. 



M.C. 



A very distinct and elegant species. The whole branch is formed by a mass of 

 tubes, the dorsal ridges being the convex surfaces of the most superficial. 



9. I. venusta, n.sp. PI. XVII., figs. 9, 10.. 



Branches very blender, dichotomously divided, nearly circular in section. 

 Zooecia very long, in alternate series of two, distinct, the upper part curved 

 forwards, smooth or minutely punctate ; peristomes much produced, tliose of each 

 pair being separated from each other. Dorsal siirface with distinct, narroAV, convex 

 ridges, closely punctate, separated by marked grooves. Occasional radical tubes 

 from the posterior surface. 



M.C. 



This very beautiful species is distinguished by the long, slender pairs of zooecia 

 projecting forwards above, and the much produced peristomes. One specimen, not 

 otherwise distinguishable, is thicker and has three zooecia in each series. 



Ra 



