256 Transactions. 



angled slightly below the middle ; the angle or keel with oblique longitudinal 

 short nodular ribs, directed backwards, about eighteen on the penultimate 

 whorl ; as the whorls progress there are one, two, and three fine undulating 

 spiral grooves which cut the axial ribs into fine gemmules ; the shoulder 

 slightly concave, with two or three fine spiral lines ; below the angle straight 

 or slightly concave, and with two ill-defined low spirals on the penultimate 

 whorl. Body-whorl below the angular shoulder slightly contracted, more 

 pronounced on approaching the canal ; the latter long, tapering, and 

 somewhat twisted to the left ; below the nodular area there are three or 

 four rather widely spaced small grooves and a number of very minute 

 threadlets on the canal. Sutures well margined above by a small rounded 

 riblet ; aperture ovate, narrowed below into a fairly long open canal ; 

 cohimolla and inner lip with a thin callus ; outer lip with a fairly deej) 

 rounded sinus situate between the angle and suture, its position on the 

 lower whorls marked by the growth-lines. 



Length, 12 mm. ; breadth, 4-5 mm. 



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



Type to be presented to the Wanganui Museum. 



The species is perhaps nearest to S. obliquecostata Suter, from which it 

 may be distinguished by the position of the sutural rib. 



Leucosyrinx subaltus n. sp. (Plate XX, fig. 7.) 



Shell elongate-fusiform ; spire-whorls with a strong acute keel a little 

 below the middle, absent on the protoconch ; the apical whorl is lost, but 

 the adjoining portion is smooth and rounded ; body- whorl strongly and 

 sharply keeled, a second low blunt angulation below it, the area between 

 them slightly concave ; the spire-whorls above the keel sloping and slightly 

 concave, below sharply contracted and somewhat concave. Sculpture 

 (except the ])rotoconch) : All whorls with closely spaced small spiral riblets, 

 which the irregular growth-striae cut into minute gemmules. Whorls 

 about eight, regularly increasing, the last (with the canal) exceeds the spire 

 in length. Sutures linear. Aperture : The outer lip imperfect, certainly 

 strongly angular above, contracted anteriorly, and terminates in a fairly 

 long canal ; columella nearly straight. Sinus between the keel and suture 

 not well marked. 



Length, 30 mm. ; breadth, 11 mm. 



Locality, Wharekuri. Collector, P. Marshall. 



Type to be presented to the Wanganui Museum. 



The species is perhaps nearest to L. alta (Harris) var. transenna Suter, 

 from which it may be distinguished by the uniform spiral sculpture on all 

 whorls exce])t the protoconch, and In' its more robust form. 



Lima waipipiensis n. sp. (Plate XIX, fig. 1.) 



Shell large, irregularly ovate, inequilateral, sculptured with fourteen 

 strong radiating ribs, narrower than the interspaces ; these are crossed by 

 irregularly developed growth-striae, which form frequent but irregularly 

 disposed hollow scales on the ribs. Beak curved forward, " imperfect." 

 Ears — anterior very small, irregularly ribbed ; posterior larger, obtusely 

 angular, sculptured with a few small riblets and numerous growth-striae. 

 The anterior end short, the margin descending abruptly and distinctly 

 concave in the dorsal third, thence straight, inclining outwards until 

 coalescing in the basal curve ; submargin straight and forming a slight 

 angle on meeting the lower curve of the valve ; the submarginal area bent 



