Knob to Mount Pleasant, from all of which specimens were collected. These points are mostly from 1,600 ft. to 1,800 ft. high.

Senecio lagopus was found to occur plentifully in all favourable localities —that is, especially on and about all steep rocks which face south and south-west—practically continuously from the Akaroa Heads, on both sides of Akaroa Harbour, to within a mile of the Port Hills. There is hardly a space of even two miles in extent anywhere along this main line in which S. lagopus does not occur; it occupies an almost continuous line between the points mentioned, and does not here differ generally from the form of S. lagopus as known elsewhere in New Zealand.

The most rema kable point about this distribution concerns the gap of about four miles, a low undulating neck, which connects the south-west peak of Mount Herbert with the Port Hills. This area is mostly under cultivation, and offers but few escarpments. There are, however; three or four possible localities, rhyolite escarpments or peaks, from 600 ft. to 875 ft. high, chiefly on the northern side of the gap. Upon the highest and most likely of these stations, rocks between Gebbie's and McQueen's Valleys, about 875ft. high, neither has been found; but upon two of them (about 600 ft. to 700 ft. high), one just north of the road from Teddington to Gebbie's Valley and the other just north of that, Senecio lagopus occurs —not plentifully, but undoubted typical S. lagopus. Between these two points and Mount Herbert, a distance of about three miles, neither plant is found, the ground being nearly all under cultivation. The northernmost of these points is barely one mile from the nearest peak of the Port Hills, that south of Cooper's Knob (about 1,600 ft. high), and here S. saxifragoides begins to appear. This seems to me a most striking and puzzling fact. Upon the peak next again to the south (on the Port Hills), though it offers an ideal locality, neither plant occurs.

We may conjecture that under the original conditions some part of this gap at least was occupied by both species, but at present S. lagopus only is found there, and that only upon the northern side, and upon what is virtually a spur of the Port Hills. Mr. R. M. Laing, however, informs me that he' has collected plants of S. saxifragoides at various points on Banks Peninsula proper, in the neighbourhood of Akaroa, and it has been seen above that both Kirk and Cheeseman give Banks Peninsula as a locality for the species. It may be suggested that states of S. lagopus, “some of which,” as Cheeseman says, “approach it very closely,” have been mistaken for S. saxifragoides. In any case, I cannot say that I have found any examples of undoubted S. saxifragoides, having no bristles at all, on Banks Peninsula proper.

On the other hand, no plants of typical S. lagopus were found by me anywhere along the Port Hills, though, as shown above, plants were frequently found in that locality which showed more of the special characters of S. lagopus than have hitherto, apparently, been observed or recorded.

Except for a doubtful record in the Kaikoura neighbourhood, Seneciosaxifragoides seems to be confined to this locality. Forms observed by me in April, 1917, on Mount Fyffe and some other points on the Seaward Kaikouras were all typical S. lagopus.

The specimens collected from Banks Peninsula and the Port Hills were preserved and fixed in such a manner as to make confusion impossible, and were then submitted while still fresh to Dr. Cockayne, together with certain inferences and conclusions to be drawn from them.

While both plants show a preference for high rocky situations and dark, cold faces, neither is by any means restricted to such localities. Both are