A MONOGRAPH OF THE TERTIARY POLYZOA OP VICTORIA. 45 



surface with irregular flattened ridges separated by shallow furrows and having a 

 row of round pores down the centre. 



M.C. ; L.B. ; W.P. (W.) 



In one specimen there are some smaller rounded cells, situated at the base 

 of a zooecium or vibracular cell, which probably also support vibracular. 



2. L. canaliculata, n.sp. PI. VII., fig. 3. 



Zoarium discoid, slightly raised in tile centre. Zocecia in regular linear 

 radiating series, with well marked wide vibracularian tracts between, elongated 

 and somewhat quadrate ; margins thick and granular ; lower third of area filled in 

 by a sloping granular lamina; aperture large, occupying two-thirds of the area, 

 the lower edge straight ; vibracularian tracts strongly granular, vibracular openings 

 much elongated, narrow pyriform, the edges crenulated from the projecting 

 granulations. Dorsal surface with regular linear ridges, with a row of pores along 

 the centre, and separated by distinct sulci, the ridges alternately wider and narrower 

 corresponding to the zocecial and vibracular series. 



L.B. 



This species is closely allied to the last, of which it should perhaps be 

 considerered a variety, the chief difference being that the vibracularian cells are 

 arranged along distinct depressed tracts, which are also defined on the dorsal surface 

 of the zoarium. The intercalated series of zooecia seem always to commence with 

 and form a continuation of a series of one or two vibracular cells. 



3. L. rutella, Tenison Woods. PI. VII., fig. <A. 



Lunulites (Cupularia) rutella, Tenison Woods, I.e., p. 7. 



Zoarium large, discoid, raised and conical at the centre. Zooecia in bifurcating 

 series radiating from the centre, mostly opposite, wider at the base ; margins thick 

 and granular ; aperture occupying almost the whole area ; on the internal sloping 

 surface near the anterior extremity are two large pits or pores and posterior to these 

 two or three other smaller round pores ; vibracularian cells between the zooecia and 

 opposite their anterior extremities. Dorsal surface irregularly divided by broken 

 radiating lines. 



S.P. ; B.R. ; G. ; L.B. 



L. aperta, so far as I can judge from the figure and description, seems to be a 

 worn state of the common form. 



