288 " THETIS " SCIENTIFIC RESULTS. 



Chlamys fenestrata, Hedley. The Eocene Dhnya sigiUata, Tate, 

 corresponds to the recent D. coirugata. Though not repre- 

 sented in the collection here discussed, two other recent 

 New South Wales bivalves may be referred to : Cardhim bechei, 

 Reeve, which is barely separable from the Eocene C. antisemi- 

 granulatum, McCoy, by the reversed cardinal teeth; and Cucullcea 

 coiicamerata, Martyn, doubtfully distinct from C. corioensis, 

 McCoy. 



The above facts suggest certain inferences. Firstly, that such 

 beds as the Eocene of Muddy Creek, Victoria, represent a fauna 

 of the hundred fathom zone ; and that if the age of the Tertiary 

 beds are to be calculated by Lyellian percentages, an exploration of 

 the hundred fathom zone in existing Australian seas must precede 

 an estimation of the dates of Australian Tertiaries. Secondly, 

 that some living representatives of the Eocene Mollusca of Vic- 

 toria now dwell six or seven degrees north of where their 

 predecessors lie ; a conclusion agreeable to the hypothesis that 

 the Eocene climate was warmer than the present. 



In this Report strange names frequently replace familiar ones. 

 The Pelecypoda of New South Wales have heretofore been named 

 according to the lists published by Angas, in the Proceedings of 

 the Zoological Society, and by Smith, in the Reports of the 

 Challenger Expedition. Neither of these writers paid much 

 regard to priority of nomenclature, and many of the names they 

 selected must now pass into synonomy. 



In preparing' this Report I have been greatly aided by the help 

 of a volunteer assistant, Mr. H. L. Kesteven, to whom my thanks 

 are due for the laborious work of separating and sorting the small 

 shells from the dredgings. 



BRACHIOPODA. 



Family' TEREBRATULID^. 

 TEREBRATULINA, D'Orhigny. 

 TEREBRATULINA CANCELLATA, Koch, sp. 



Terebratula cancellata, Koch, Conch. Cab., vii., 1843, p. 35, pi. 266,. 

 f. 11-13. Terehratulina cancellata, Davidson, Trans. Linn. 

 Soc, iv., 1886, p. 35, pi. vi., f. 1-8. 



Station 46. 



One specimen from 50-6G fathoms off Jiljl)on. 



