(1) Introduction Dr. Trechmann, who had been favoured with identifications from Mr. S. S. Buckman, at first had the intention of dealing in the foregoing paper with some of the ammonites that he had collected in New Zealand ; but, at his request, I have undertaken, in this appendix, a description of a larger series of ammonites, incorporating therewith observations on certain :New Zealand specimens long since acquired by the British Museum (Natural History) and others sent recently by :Prof. P. Marshall and the Geological Survey of New Zealand. The examples originally forwarded by Dr. Trechmann included five belonging to the genus Psiloceras, of the Lower Lias, and five ammonites from the Upper Jurassic, representing the genera Phylloceras, Uhligites, and Aululacosphinctes'. In addition there were an unidentifiable fragment of probably an Upper Jurassic ammonite, from Kohai Point, and several Senonian forms, already briefly mentioned elsewhere1; further, a Jurassic Phylloceras and a Lytoceras belonging to Prof. Marshall. The Liassic ammonites in the British Museum, described below, belong to the genera Phiylloceras, Rhacophyllites, and Lytoceras,(Thysanoceras). There is no detailed information available with these specimens, the matrix of which is a hard, dark-green rock, exactly like that of one of the Upper Triassic Pinacoceras recorded by Dr. Treehmann,2 or of the Hettangian .Psiloceras. These had ,been bestowed among Neocomian ammonites, perhaps on account of the green matrix, the Lytoceras fragment being labelled 'Crioceras. With them was the indeterminable impression of an ammonite in an unlocalized, similarly hard, compact, dark-green rock. Two .additional examples