24 NEW ZEALAND PALAEONTOLOGY. 



rising into a flabellate mass^ round wliicli there are lobes formed 

 by fascicles of tubes. The pores of the lobes larger and more 

 inclined than those of the central mass. Alt. 5 millim. App. 

 Off. Cat., p. 37, No. 38. Shakespeare Cliff (lower part), Wanga- 

 nui ; III. Fig. 25, zooarium, much enlarged. 



Genus — Idmonea. Lamouroux, 1821. 



Zooarium calcareous, ramose, erect ; branches laterally com- 

 pressed, angular in front, convex or flat behind ; orifices of the 

 cells in oblique alternate lines on each side of the central keel ; 

 surface smooth, cells often margined and punctate. 



Idmonea alternata, n. s. Distinguished by the cells being in 

 a single alternate series. Central keel very prominent. Better 

 specimens wanted for a complete diagnosis. App. Off. Cat., 

 p. 40, No. 90. Enclosed in a mass of Bryozoan limestone from 

 White Rock Point, north of Mokihinui Eiver, West Coast, Nel- 

 son; IV. or V. 



Genus — Retepora. 



Of this genus there are many specimens in the collection, 

 but none sufficiently perfect for identification. The reason 

 of this is that the cells are disposed in a loose, friable 

 incrustation on one side only of the zooarium. They are so 

 easily broken away that very seldom is a specimen found which 

 has the cells preserved. One small fossil in which the fenestrse 

 are exceptionally close is the only one I have attempted to 

 identify, and this I have named provisionally R. contiyua. One 

 is named by Stoiickza in the geology of the cruise of the '^No- 

 vara." I have little doubt that a good many of the species are 

 identical with those of the Australian Tertiary formations, where 

 Retepora is a common fossil. What is wanted is a monograph 

 of the genus, so that the whole may be reviewed and compared 

 together. 



Genus — Eschara. Ray."^ 



Zooarium calcareous, erect, ramose ; with flattened branches 

 and urceolate decumbent cells, disposed quincuncially on both 



*TLiis is the statement of Stoiickza, who gives no authority, but adds the date 

 1724. There must be an error somevdiere, as Kay died in 1704. Nearly all authors 

 since Ellis give Ray as the founder of the genus Eschara, taken, I suppose, from the 

 Syn. Stirpiuui Brit., Lond. 1690. It is evident, hovv'ever, that Ray refers to Fiustra. 

 The proper authority is Lamouroux, 1821. 



