254 Transactions. 



part of the CastleclifE beds at Wanganui. Such well-known fossil species 

 as Lidmria solida, Cardium spatiosiim, Ostrea ingens, and Peden trij^hooJci 

 have been found in the same bed. In a collection which is quite incomplete 

 some 70 per cent, of the species are Kecent. I propose to call this bed, 

 from which more complete collections will shortly be made, the Waipipi 

 series, in the upper part of the Oamaru system. 



Luciiiida levifoliaia occurs in the same bed, and also at Nukumaru, 

 where it is associated with Melina zealandica, Lutraria solida. and Struthio- 

 laria frazeri. .The whole molluscan fauna so far collected at Nukumaru 

 contains about 80 per cent, of Kecent species. This horizon also offers 

 good material for collecting, and will be called the Nukumaru series of 

 the upper part of the Oamaru system. The series is perhaps 500 ft. above 

 the Waipipi series. 



The two remaining species, Thracia vecjrandis and Surctda castlecliffensis, 

 came from the Castlecliff Beach, near Wanganui. The percentage of Eecent 

 species in this fauna approximates to 90. It is the highest described 

 series of the Wanganui system. A list of the Mollusca found in it will 

 shortly be published. 



Ataxocerithium perplexum ii. sp. (Plate XX, figs. 5, 6.) 



Material, two examples, much rolled and having the sculpture almost 

 erased except on a small area near to the aperture, which is spirally 

 ribbed ; interspaces and ribs about equal, the latter cut into small gem- 

 mules by the varying development of the growth-striae. Shell elongated, 

 turreted, body-whorl exceeding one-third of the total length, base rounded 

 and with an ill-defined spiral ridge, anterior to which it is rather more 

 abruptly contracted. Sutures well marked, apparently not channelled. 

 Apex imperfect. Aperture ovate, produced in a very short open canal : 

 outer lip more or less channelled above ; body-wall with a well-marked 

 callus which unites with the columella and forms a distinct ridge : the 

 columella is slightly arched and twisted to the left at the anterior end. 



Length, 34 mm. ; breadth, 11 mm. ; length of aperture with canal, 

 10 mm. 



Locality, Nukumaru, in blue sandy clay. Collector, P. Marshall. 



Tyije to be presented to the Wanganui Museum. 



The examples are much worn, the only area with sculpture being near 

 to the outer lip. Sculpture on approaching the aperture in many genera 

 is more or less suppressed : we may therefore reasonably expect a bolder 

 sculpture on the spire-whorls of better-preserved examples. 



Fusinus maorium ii. sp. (Plate XXI, figs. 1, 2.) 



Material, two fragments ; the larger consists of the penultimate and 

 body whorls, with a small part of the canal ; the other, the complete canal 

 and greater part of body-whorl. Shell fairly large, fusiform, penultimate 

 whorl subangular at the periphery, body- whorl rounded or slightly angular, 

 rather abruptly contracted at the base ; longitudinally and spirally ribbed ; 

 canal long, slender, and almost straight ; sutures deeply impressed, slightl}- 

 undulating, margined above and below by a small riblet. The longitudinal 

 ribs are broad and flexuous, about fourteen on a whorl, most prominent 

 on the periphery, obsolete on the lower portion of the base as it unites with 

 the canal : interspaces narrower than the ribs, crossed by undulating spiral 

 cords. On the penultimate whorl there are seven of these, excluding the 



