from the South Australian Tertiaries. 183 



3. Conosmilia elegans, gen. et sp. nov. 



4. anomala, gen. et sp. nov. 



5. striata, gen. et sp. nov. 



6. Antillia lens, sp. nov. 



1. Sphenotrochus australis*, n. sp. PI. VIII. fig. 1 a, b, c, d. 



The coral is very compressed, especially inferiorly, where on 

 either side of the centre of the base a process passes downwards, 

 giving a " fish-tail " appearance. At the calice the compression 

 is less; but the great axis is at least twice the length of the 

 smaller. The coral is longer than its breadth. The costse are 

 broad, somewhat wavy, and are separated by well-marked lines : 

 those of the inferior appendages arise from the extremities of 

 the processes, and pass upwards and inwards ; and the lateral 

 costse, wavy below, become straight above. All are plain. The 

 wall is much thicker at the ends of the long axis than elsewhere 

 (in sections). The calice is not shallow, is elliptical, and pre- 

 sents, deeply seated, a long lamellar columella, which is joined 

 to the primary and secondary septa by processes. The septa 

 are well developed and plain ; they are not exsert, but pass 

 straight downwards and inwards towards the columella; they do 

 not correspond with the costse, but with the intervals between 

 the costse, and they number thirty-two. There are three cycles, 

 with the orders of a fourth, in two systems. 



Height ^ inch, breadth ^ inch; small diameter, halfway, 

 ~q inch. 



Hamilton, Victoria, South Australia. Coll. Geol. Soc. 



2. Sphenotrochus emarciatus, n. sp. PL' VIII. fig. 2 a, b, c, d. 



The coral is generally much compressed, especially inferiorly, 

 where two lateral processes give a notched or emarciate appear- 

 ance to the base. Superiorly the relation of the long to the 

 short axis is at least 2 to 1. The coral is short and broad; the 

 base is nearly as wide as the calice is long. The costse are large 

 and plain, and are separated by well-marked lines : the costse of 

 the appendices are the largest ; they pass upwards to the calice, 

 and all are more or less wavy, the central widening out near the 

 calicular margin. The calice is shallow and elliptical. The 

 columella is not long, and, from being joined to the primary 

 and secondary septa by processes which are rounded above, is 

 confused in its appearance. The septa are in six systems of 

 three cycles; they are wider at the wall than elsewhere, are 

 granular, and those of the third cycle are much smaller than 



* Mr. Woods gave the name ; but I have not had the opportunity of 

 seeing his MS. 



