3l4 Transactions. — Geology. 



Oliva neozelanica. PI. xviii., fig 1. 



Shell oblong, the spire acuminate, of 4-5 whorls, each of which has an 

 anterior callous band covering nearly half the whorl : suture excavated. 

 Aperture narrow, the columella twisted and with four or five spiral grooves 

 anteriorly. 



Length, 1*5 inch ; breadth, -63 inch. 



Locality. Patea. 



Perhaps the same as 0. australis, Duclos. 



Columbella varians. PL xviii., fig. 2. 



Shell oblong, the spire prominent and acute. "Whorls 7, flattened, 

 spirally grooved. Grooves variable, sometimes only one on the anterior 

 half of the whorl, sometimes several are equally distributed all over ; 

 generally there is a smooth band without grooves on each whorl ; some- 

 times the spire whorls are quite smooth or with one or two grooves only. 

 Suture deep. Aperture less than half the length of the shell, oval with the 

 right lip flattened ; the posterior canal well marked ; columella smooth and 

 rounded; the anterior canal very short; right lip toothed within. 



Length, -37 inch; breadth, -15 inch. Length of aperture, *14 inch. 



Locality. Wanganui and Petane. 



A variety occurs at Wanganui in which the whorls are longitudinally 

 plicated. 



Columbella pisaniopsis. 



Shell fusiform, the spire produced and sharp. Whorls 7 ; the two first 

 embryonic, smooth, polished ; the others rounded, rather gibbous behind, 

 and with rather close spiral ribs. Spire whorls and posterior portion of the 

 body whorl with regular, but not strong, longitudinal plications. There are 

 eighteen or twenty longitudinal plicas on a whorl. The penultimate whorl 

 has 7 or 8 spiral ribs, the body whorl has from 16 to 20. Suture well 

 marked. Aperture narrow, roundly angled behind ; the right lip sharp, 

 toothed inside ; the columella smooth. 



Length, -38 inch ; breadth, -17 inch. Length of aperture, *15 inch. 



Locality. Petane. 



Columbella cancellaria. 



Shell fusiform, the spire produced and sharp. Whorls 6 or 7, the first 

 two embryonic, polished ; the others slightly rounded and with strong 

 spiral ribs crossed by longitudinal ribs which are not so strong as the spiral 

 ones, dividing the surface hito squares. There are 5 spiral ribs on the 

 penultimate whorl, and about 15 on the body whorl ; the grooves are 

 rather broader than the ribs, and are longitudinally striated. The longi- 

 tudinal ribs die away anteriorly on the body whorl. Suture well marked. 

 Aperture narrow ; the outer lip sharp, but thickened and toothed inside ; 

 the columella smooth. 



