the need for a new division. The shell is very peculiar, having the very large protoconch of Uxia (but far more asymmetrical, and with an immersed nucleus), the shell formation of Aphera, the strong basal fasciole and notch of Cancellaria, a slight umbilicus, and a straight columella. The general appearance is that of Bivetia, but the anterior notch is more lateral, the columella plaits different, and the pillar much less bent backwards and twisted; the apex disagrees radically. Cossmann, in mentioning this shell, has already indicated the probable need for a new group. Merica wannonensis (Tate) has a somewhat similar aperture, but a different form of growth and embryo. Oamaruia n. gen. Type, Admete suteri M. & M. This shell and its Australian allies do not correlate well with any Cancellarid group: the reticulate sculpture of strong, sharp, spiral and axial ridges; the very strong peripheral keel, and wide, smooth shoulder; the inflated body-whorl, and rather short spire; the mere truncation of the slightly developed canal; the absence of fasciole and umbilicus'; the straight pillar, flexed a little to the left below, and bearing two close, transverse plaits as in Inglisella, with a third spirally twisted, almost vertical ridge forming the base of the columella; and the small, one-whorled, askew protoconch, form a characteristic and easily recognized combination. Nassicola n. section. Type, Neptunea costata Hutt. In shape and appearance of canal somewhat intermediate between Aethocola and Cominella, but the apex shows that relationship is really with the former. The strong, keeled fasciole; the short and rather indistinct canal, bent strongly to the left instead of spirally downwards; and the general habit of the shell, all demand sectional recognition under Aethocola. Further species of both Aethocola s. str. and of Nassicola are awaiting description. Rugobela n. gen. Type, Ptychatractus tenuiliratus Sut. This shell and its Neozelanic and Australian allies have been fully discussed in the paper, and the necessity there shown for a new genus. Parasyrinx n. gen. Type, Pleurotoma alto Harris. Related to, and classed by Suter under, Leucosyrinx, which has a different type of sculpture; shorter, more flaring, and more bent canal; and much shallower, more open sinus. The sinus of Parasyrinx is in shape and depth quite reminiscent of Bathytoma, but is on the lower third of the shoulder instead of on the keel. Characteristic of the new genus, too, is the one strong peripheral keel, the typical species being otherwise quite bare of ornament, though other forms have weak basal spirals. Here may be placed Leucosyrinx subalta M. & M. and Surcula protransenna M. & M. There are several genera to which these shells bear resemblance: Leucosyrinx, Irenosyrinx, and Steiraxis all contain forms more or less superficially similar to species of Parasyrinx, but, on close inspection, uniformly of a different facies; their sinus is open and not deep, and the pillar much shorter and obliquely truncated. Parasyrinx has a but faintly twisted, long, slowly narrowing pillar. Ancistrosyrinx and Rouaultia are likewise carinated,