152 



fossil coral is very abundant in the eocene beds of almost all 

 localities, and is also sparingly found in the Gippsland mio- 

 cene. A coral from Dr. Verco's later dredgings off the South 

 Australian coast exactly resembles in outward appearance 

 the common tertiary fossil, the only difference being that its 

 calice is narrower in proportion to its length. I think it may 

 rank as a variety, but certainly no more. The major and 

 minor axes of the calice are as 180 to 100. In the fossil the 

 relative proportion of the axes is as 150 to 100, and in an 

 exceptionally compressed specimen as 166 to 100. Duncan 

 gives the ratio of the longer to the shorter axis in the fossil 

 as 2 to 1, but he is certainly wrong. 



In all, nine specimens of the recent coral were obtained, 

 and the calices show the same number of septa, and the same 

 confused appearance of the columella, that Duncan mentions 

 in regard to the fossil. 



Height, 6 mm. ; length of calice, 4"5 mm. ; breadth of 

 calice, 2'5 mm. 



Dredged east of Neptune Island at 45 fathoms; at 90 

 and 130 fathoms off Cajje Jaffa; and at 49 and 150 fathoms 

 off Beachport. 



Genus Teematotrochus, Tenison Woods. 

 Trematotrochus Medley i, spec. nov. PI. v., figs. \<t, h. 



This is a Trematotrochus of the same type as the fossil 

 one first described by Woods, viz., T. fenestratus, but is 

 broader and less pointed at the base; the perforations in the 

 wall are also larger. If any doubt still lingered as to the 

 complete perforation of the wall in this type of Trematotro- 

 chus, it would be dispelled by looking at the examples now 

 described, since, when viewed against the light, the openings 

 show almost as distinctly inside the calice as on the outside 

 of the wall. 



The corallum is conical, and tapers by a double curve to 

 the rounded base. At the actual margin it is slightly con- 

 stricted, and broadens out just below to its greatest circum- 

 ference. The calice is circular and shallow. 



The septa are in six systems, with three cycles. The first 

 and second orders are exsert, sparingly granular, equal, and 

 extend to the columella; they are stout compared with the 

 tertiaries, which, like those of its fossil analogue. T. fenestra- 

 tus, are extremely thin and reach but a very short distance 

 in the calice. There is a distinct columella, which is papil- 

 lary superiorly, but becomes solid below, where the larger 

 septa fuse with it. 



The costae, which correspond with the septa, are stout 

 and equal, those of the third order being quite as large as the 



