Table I.—Upper Lancefieldian Graptolites. Collection. K Q X Bryograptus (?) antiquus (T. S. Hall) 10 4 — B. antiquus? var. inusitatus B. and K. 1 1 X B. hunnebergensis Moberg 11 6 X B. simplex Tornquist* The form mentioned by Chapman (1934, pp. 115-6) as B. consobrinus (a nomen nudum) was found later to be B. simplex. 2 1 X Clonograptus tenellus var. kingi B. and K. X C. sp. indet. 2 Trochograptus (?) sp. X Tetragraptus decipiens T. S. Hall 3 5 T. decipiens var. bipatens K. and H. X Didymograptus taylori T. S. Hall 12 3 X This association clearly belongs to that which characterises the beds at Preservation Inlet and Cape Providence, which have been compared with the L2 beds in Victoria. It will be seen that there is a thickness of at least 500ft. of Lancefieldian beds in the Aorangi area. It may be expected that the fauna of the immediately underlying L3 beds will eventually be found here. Bendigonian. At Locality L in the gully immediately north of that containing Locality K, and in a cutting wherein the stream had been diverted near a small waterfall, a fossiliferous bed is displayed, wherein King and McKee obtained the following:—Bryograptus sp. indet. (4), Tetragraptus approximatus Nich. (8), T. decipiens (1), T. fruticosus (J. Hall) 4 br. (1), T. quadribrachiatus J. Hall (3), (and many stipes apparently belonging to this species), Didymograptus taylori (1); also an indeterminate fibrous form resembling Strophograptus or Trichograptus, but without obvious thecal openings. These fossils occur in a glassy slate resembling that of the L2 beds. This small assemblage is typical of the B5 or basal Bendigonian Zone. The profile on our map shows that the thickness of this bed cannot be much more than about a hundred feet, unless the apparent thickness has been much reduced by strike-faulting. A Transitional Fauna. At Locality J, forty yards west of Locality K, on a western branch of Little Slaty Creek, King and McKee obtained the following:—Bryograptus sp. (1), T. fruticosus 3 br. (1), D. extensus-nitidus (2), D. protobifidus Elles (2), Phyllograptus ilicifolius var. grandis. E. and W. (2). These forms are too few to permit us to do more than refer the assemblage to the D. protobifidus Passage Beds as defined by Harris (Benson and Keble, 1935, p. 263). They must lie almost on the boundary of the Bendigo and Castlemaine Series, and, in any case, the thickness of strata characterised by this assemblage is so small that the boundary line between these series would pass through Locality J on our map. Lower Castlemainian. No beds containing fossils referrable with certainty to the base of the Castlemainian were found by King and McKee. Hector's illustrations (1886) of fossils in Cox's collection from the old Golden Ridge Mine (Localities 431 and 457; Q on our map) make it clear that the basal zone C5 is present there, as