115 



shell a brilliant g-i'ocn nacre underneath the outer phellj coat. 

 Diam. and Lat. about 3 mil., dedicated to the eminent geolo- 

 gist, the Rev. W. B. Clarke. A fossil which varied so much 

 in the few specimens I examined that I hardly liked to include 

 it in my list. 



Dendrophyllia duncani. n.s. This is a compound 

 corallite, with a very imperfect epitheca. It gives off four 

 branches from a kind of internode, but in the specimens 

 examined by me (among the corals collected by R. M. Johnston, 

 Esq., Dr. Milligan, and Mr. Stephens), the branches and 

 stem -were broken off' short. It differs from the hitherto only 

 Australian tertiary species in the internodal character of the 

 branches and the imperfect epitheca. A complete diagnosis 

 ■will no doubt be published by Professor Duncan, to whom 

 the specimens will be forwarded, but I have taken veiy gladly 

 the opportunity of dedicating it to the learned Professor, to 

 •whom the science of geology owes so much. 



Flabellum duncani.' n.s. The coral is cuneiform and 

 very much compressed at the base, which is pedicillate. The 

 calice is elliptical and shallow. The septa are in six systems 

 of three cycles, delicate and well apart, the principal exsert 

 and rounded, having few large rounded lateral granules. The 

 fossa is deep and rather broad. There is no columella. There 

 is a stout epithera, and the costse are strongly marked, linear 

 tapering with faint ti'ansverse curved folds, 22-24 in number. 

 Height, 6, transverse diam. of calice, 4f . Lat. 3, millim. 

 This is the fifth flabellum described from the Australian 

 tertiaries. It is smaller than any of them, and mainly dis- 

 tinguished by the distinct external costae. 



BusKiA. nov. gen. This genus is proposed for Escharas, 

 which are disposed on a cylindrical hollow axis, which is 

 branched and irregular. It differs from Eschara in not having 

 the cells back to back, but on one side only of the cylindrical 

 branches, and from Hemeschara, in being erect and branched, 

 and not encrusting. 



BusKiA TYPicA. n.s. Cells disposed sometimes quincun- 

 cially and sometimes irregular, surface of the branches 

 crumpled aud flexuous, elliptical branches irregular and 

 widely separated ; if bifurcating a very wide cellular interval 

 between the opposite divisions ; cells convex and projecting 

 from a very clearly defined margin, within whicli there is a 

 row of pores continuing all round from 18-26 in number. From 

 each pore there is a deep grove to the mesial line, which is also 

 sometimes grooved, and then the surface has a rugose cor- 

 rugated appeai'ance ; mouth orbicular, with a somewhat larger 

 often pyriform pore on eacli aide. Width of some of the 



branches, 10 diam. 7 mill. 



•> 

 V 



