Thomson. — Fossils from Kakanui. 99 



should be uniformly applied, and also that publication should 

 be delayed till his revision of the Tertiary Brachiopoda came 

 out.* In the meantime the author removed to England, and 

 found it necessary to send off the manuscript of his paper on 

 the gem gravels of Kakanuif before receiving the revision. 

 Consequently the latter paper, which gives an account of the 

 beds from which the fossils were taken, does not always employ 

 the names to which in the former paper Captain Hutton gives 

 his authority. The necessary corrections will be made by 

 substituting Terebratula for Liothyrina, and Terebralulina for 

 Notothjris (on p. 488 et seq.), and filling in the new species from 

 those described below. 



Corals. 



Isis dactyla, Tenison- Woods. 



1880 : " Corals and BryozoaJ of the Neozoic Period in New 

 Zealand," p. 7, fig. 1. 



This species is common in the limestones at Kakanui. Some 

 specimens agree well with the description ; the condyles in 

 some cases are more conical than those figured by Tenison- 

 Woods, while others have the condyles depressed, with a small 

 central cone. 



Isis hamiltoni, nov. sp. Plate XIV, fig. 1. 



Short, thick, cylindrical, often branched, sides irregularly 

 longitudinally striated, sometimes striae branching ; condyle 

 depressed, with a small central cone ; radiately striated. 



This species seems to be the same as one figured by Duncan. § 

 With regard to the identification of the genus, he says in another 

 paper,^[ " The calcareous bodies form little trunks or columns 

 varying in height and in the amount of external striation. The 

 branches commence from the calcareous bodies, and not from 

 the horny matter. It is this branching from the calcareous 

 body which distinguishes the genus Isis from Mopsea, in which 

 the branching starts from the horny substance. Hence, if 

 branching calcareous bodies are found, they may be safely at- 

 tributed to the first-named genus ; but if calcareous bodies with- 



* " Revision of the Tertiary Brachiopoda of New Zealand," Hutton, 

 Trans. N.Z. Inst., vol. xxxvii, p. 474. 



f " The Gem Gravels of Kakanui, with Remarks on the Geology of the 

 District," Thomson, Trans. N.Z. Inst., vol. xxxviii, p. 482. 



J This was published as part iv of " Palaeontology of New Zealand " by 

 the Colonial Museum and Geological Survey Department. 



§ Quart. Journ. Geol. Soc, 1875, p. 675, and pi. xxxviii, figs. 1 and la. 



^f " On some Fossil Alcyonaria from the Australian Tertiary Deposits," 

 torn, cit., p. 673. 



