262 DB. C. T. TEECHMANN ON THE [vol. lxxix, 



and illustrations were made. It resembles the group of 

 P. actinomphala Deslongchamps of the Inferior Oolite and P. 

 mirabilis Deslongchamps of the Middle Lias. The depression 

 of the spire and the size of the umbilicus and strength of the 

 nodes, both above and below, are remarkable features. 



Ambeeleta zealaistdica, sp. nov. (PL XIII, fig. 12.) 



Description. — Shell thin, consisting of seven inflated whorls,, 

 which increase rather rapidly in size. On the penultimate whorl 

 are three ridges, the first of which is situated rather less than half 

 of the distance of the whorl below the suture. The third or 

 lowest ridge occurs a short distance above the suture, and is 

 rather less prominent than the other two. The last whorl bears 

 seven ridges which gradually decrease in size, the first two being 

 about equally prominent, the second being perhaps very slightly 

 the larger. The first ridge occurs rather more than a third of the 

 distance between the suture and the base of the whorl. The space 

 between it and the suture is concave, and on it the faintest trace 

 of another ridge can be seen a short distance above the main 

 ridge. The larger growth-lines are regular and sharp, and some- 

 what foliaceous, producing a series of sharp tuberculations on the 

 ridges. They sweep strongly backwards and then forwards, and 

 continue below the first ridge with a slight forward inclination. 

 The aperture is not visible, and the shell on the earlier whorls is 

 missing. 



Dimensions. — Height = 21 mm. ; height of last whorl = 

 10 mm. ; diameter of the same = 14 mm. 



Locality. — Totara Point, Kawhia. 



Remarks. — This shell apparently belongs to the group of 

 A. capitanea Minister and A. ornata Sowerby. In the rather 

 swollen outline of the whorls it recalls the Upper Liassic form 

 A. capitanea rather than the more sharpby ridged A. ornata, but 

 the first ridge is situated farther below the suture than in 

 A. capitanea, and the surface is more concave. It would be 

 ■unwise, I think, to refer it definitely to either of these European 

 forms, especially since W. H. Hudleston regards A. ornata as a 

 modified descendant of A. capitanea on a higher horizon. 



Ceeithinella sp. (PL XIII, fig. 13.) 



Description. — Shell subcylindrical, consisting of ten or 

 eleven whorls which increase gradually in size. The whorls are 

 nearly flat, and the sutures impressed. Below the sutures is a row 

 of nodes, and below these about six concentric raised spiral lines, 

 which are more or less broken up into small nodes by the growth- 

 lines. The base of the last whorl is decorated with similar 

 concentric raised lines. Neither the apex nor the aperture is well 

 seen. 



Dimensions. — Height = 24 mm.; height of body-whorl = 

 6 mm. ; diameter of the same =6 mm. 



