130 Transactions. 



Length, 9-5 mm. ; widtli, 3 mm. 



Locality, Hampden. Collected by Dr. Marshall. 



Type to be presented to the Wanganui Museum. 



Described from a single specimen ; the only other species of the genus 

 recorded in our Tertiary fauna is T. lutea Sut. A casual examination 

 of the Hampden shell might easily lead to its being referred to that 

 species, and probably it is akin to it ; the protoconch is missing, and not 

 infrequently it possesses important specific characters. 



Dicroloma zelandica Marshall. (Plate VII, fig. 13.) 

 Trans. N.Z. Inst., yoI. 51, pp. 228-29, pi. xv, fig.. 16, 1919. 



The example here described is partly embedded in the matrix, and the 

 sculpture is much eroded, but the general form is well preserved. Shell 

 small, fusiform, of six whorls, the last rounded, abruptly contracted at the 

 base, with a narrow and moderately long anterior canal, which is slightly 

 inclined or bent to the left ; spire-whorls convex, the apex missing ; sutures 

 not impressed, the removal of the outer shelly layer gives to them a some- 

 what deep appearance. Sculpture : On the last whorl, a little below the 

 periphery, is a strong spiral rib, a second below this margining the base, 

 and beneath these two or three more slender cords, the first-mention£d 

 ribs about twice their own width apart. Aperture oblique, rather narrow, 

 the outer lip expanded, thickened, and with two prominent lobes, while 

 from each lobe proceeds a long stout digitation (the extremities broken off) ; 

 the posterior digit is almost at right angles to the axis of the shell and 

 proceeds from near to the sutural margin ; above its junction is a fairly 

 strong callus which spreads to the suture above ; the median lobe and 

 digit are somewhat larger than the above, and the space between and the 

 angle formed are smaller than between the median and the anterior canal. 

 Each digit has a pronoimced smooth furrow ; the groove of the anterior 

 canal is little more marked than that of the digits. 



Length, 23 mm. ; width (excluding digit), 13 mm. 



Locality, Hampden. Collected by Dr. Marshall. 



Struthiolaria zelandiae n. sp. (Plate VII, figs. 11, 11a.) 

 Shell ovate, oblong, spire turreted, whorls spirally ribbed, rather flat- 

 tened, shouldered at the sutures, which are deeply excavated, the last 

 more or less angled at the base. Whorls six or more, apex lost. Sculpture : 

 On the last whorl a broad usually strong spiral rib on the sutural shoulder, 

 followed by six or seven narrow cords, thence two stronger cords, the first 

 of which is the more prominent and forms the basal angle, anterior to 

 this contracted and with five or six cords which are usually smaller and 

 more widely spaced as they approach the anterior end ; the grooves deep 

 except immediately below the shoulder where they vary considerably, in 

 some examples feeble ill-defined corrugations, in others narrow incised 

 lines, or clean-cut, deep, and slightly narrower than the riblets. The first 

 of tlie remaining spire-whorls with a few spiral threadlets, on the following 

 whorls increasing td seven or eight, variable as on the last, usually distinct 

 in the deeply excavated sutural area. A secondary sculpture of fine thread- 

 lets adorns both ribs and grooves. Aperture ovate, oblique ; outer lip 

 sinuous, strong, and reflexed ; inner lip with a broad fairly heavy callus ; 

 columella curved, a distinct notch at the anterior end. 



Length, 36 mm. ; width, 27 mm. Another example : Length, 35 mm. ; 

 width, 24 mm. 



