Fossil Cetacea of New Zealand II.—On Lophocephalus, a New Genus of Zeuglodont Cetacea* The first article of this series was published in Vol. 65 of these Transactions, and entitled “The Teeth of an Extinct Whale, Microcetus hectori, n.sp.” By Professor W. B. Benham, F.R.S., F.R.S.N.Z., Hutton and Hector Medallist. [Read before the Otago Branch, September 8, 1936; received by the Editor, October 28, 1936; issued separately, June, 1937.] This new genus is founded on the study of two skulls, or rather on the posterior part of two crania, which are manifestly not Squalodonts; both are very imperfect in that the rostrum and frontal region are lacking, but sufficient of the cranium remains to indicate (1) that the nostrils were situated far forwards, (2) that the parietal bones take a considerable share in the formation of the roof. The two parietals meet on the dorsal surface and produce a well-marked “sagittal crest” along the median line, from which each bone slopes rather steeply at an angle of 45° down to the broken latero-ventral margin; there is no sign of any great decrease in width of the cranium, which is as great at the anterior as at the posterior end of the fragment, owing to imperfection in the region of squamosal. Of these two skulls, the larger belongs to the Department of Geology, and for the examination of this I wish to thank Professor Benson. Unfortunately we have no record of the actual locality at which either of the skulls was found, but from the character of the matrix there is no doubt that they came either from the Milburn or the Clarendon quarry, white limestone of “about the Upper Oligocene” (Marwick). It naturally occurred to me that this skull might be that of Kekenodon† J. Hector, Trans. N.Z. Inst., vol. 13, p. 435, 1880. but as not teeth accompany it, and as no skull is known for Kekenodon, it seems necessary to give a new name to its owner. Even the larger of the two crania appears to be too small to carry the huge teeth, 4–5 inches in length, of K. onamata. Since it is desirable to have a distinctive name for the fossil, I have taken the sagittal crest as the foundation for the generic name (lophos being Greek for the crest carried by a helmet), while the specific name serves to recall the important and extensive geological work carried out by Emeritus Professor James Park, recently of the University of Otago.