The record of Cymatium minimum (Hutt.) should be erased from all Awamoan lists, and probably from most others, the type of that species (which has been found by Mr. Marwick, and which, through his courtesy, I have examined) having a tall, slender spire, and in sculpture and appearance differing altogether from the form which is common at most Awamoan horizons, and which really represents a new species of Austrotriton, very closely related to the Recent A. parkinsonianum (Perry). The shell described from Target Gully by Marshall and Murdoch as A. neozelanica seems to have little in common with that genus, and is more fittingly placed in Charonia; a new species I have from Clifden, Southland, is closely related and is undoubtedly a Charonia. Turris regius Sut. and Borsonia rudis (Hutt.) are characteristic Waiarekan species, and really occur, as far as is yet known, only in the Waihao greensands. Nothing like them occurs at Target Gully, and both these records should be expunged. The existing records of Borsonia from the Awamoan (and often other horizons) are mostly based on fractured examples of Suter's Ptychatractus pukeuriensis or allied species (which are discussed later). I have not yet seen any example of a true Borsonia from the Awamoan. Corbula canaliculata Hutt. and C. humerosa Hutt. are listed as separate species, but are really opposite valves of the same species. All the specimens of C. canaliculata that I have, from many Oamaru localities, are right valves, and all of C. humerosa are left valves; all my double-valved shells are humerosa on one side and canaliculata on the other. The two forms always occur together. Suter, when examining the type of C. humerosa, mistook the ligament process for a cardinal tooth, and the dental socket for a resiliary pit; he accordingly described it as a right valve, but from the sculpture and his figure it is undoubtedly a left valve. The type of C. canaliculata is from Mount Harris, and that of C. humerosa from White Rock River; these horizons are both Awamoan and approximately coeval, so that when the above remarks are borne in view any doubt as to their representing the same species disappears. The specific name humerosa has two years' priority, and should be used to cover all these forms. The shells classed in Bela, Ptychatractus, and Borsonia by Suter are unsatisfactorily placed in several cases, but their true position is very difficult to determine. Ptychatractus tenuiliratus Sut., Bela infelix Sut., and B. canaliculata, Sut., whatever their true location may be, are undoubtedly congeneric, agreeing in details of general shape and ornament, conoidal, many-whorled protoconch, columellar plications, and distinct rounded sinus close to the suture. Cossmann has referred B. canaliculata Sut. to Ptychatractus (1) in the family Fusidae, but the sinus shows that these shells are Turrids: possibly the shell Cossmann studied was wrongly labelled. Suter's location in Bela auct.—for which, by the way, Iredale has advocated the substitute Oenopota (6a)—is also unhappy, as this genus has a different protoconch, and no columellar folds. Tate (14) has referred what seems to be an essentially similar shell to Cordieria, and compared the Australian C. conospira Tate with the Paris Basin C. marginata Desh. and C. turbinelloides Desh., but these have quite different columellar plaits, and are much more like some New Zealand species of Borsonia from the Waihao greensands. Tate's species agrees very well with P. tenuiliratus Sut. in sculpture, apex, and plaits, but is more slender. More recently, May (10) has figured Daphnella columbelloides T.-Woods, which he places in Buchozia, and this shell seems still closer to the Neozelanic P. tenuiliratus Sut. Evidently a homogeneous group of species is represented by these shells, and their peculiar nature will probably