40 PROCEEDINGS OF THE MALACOLOGICAL SOCIEXY. 



cords is provided with a fine thread, and the carina bounding the base 

 bears the suprasutural cord ; base with six fine cingula. Colour dirty 

 white (dead shell). Spire high, narrowly conical ; outlines lightly 

 convex. Protoconch globose, smooth, and polished. Whorls 8, 

 regularly increasing, convex ; base nearly flat. Suture impressed. 

 Aperture vertical, oval, higher than broad. Outer lip sharp, with 

 a broadly rounded, not very deep sinus. Basal lip effuse. Columella 

 vertical, almost straight ; inner lip slightly reflexed, spreading over 

 the parietal wall as a thin, white, and shining callus. Diam. 3"7, 

 height lU-8mm., specimen of 8 whorls. 



Hah. — Dredged off Otago Heads (A.. Hamilton). 



The only specimen I possess has the outer lip damaged ; the shell 

 is no doubt not quite full-grown. There is a very nearly allied form, 

 still undescribed, from the Pliocene of Waikopiro in my collection. 

 Type in my collection. 



52, Tdehitella difficilis, u.sp. PL III, Fig. 52. 



Shell small, elevated conical, rather thin, lower whorls Avith three 

 cingula, the lowest suprasutural. Sculpture : the first two whorls 

 smooth, the third with a spiral at the periphery and one below it, the 

 next four whorls with four spirals, interspaces subequal, the lowest 

 spiral close to the suture ; on the remaining whorls the second, median, 

 spiral is becoming much finer, and at the same time another fine spiral 

 thread appears ; very soon they increase to the number of six to eight, 

 filling the interspace between the original first and third prominent 

 spiral ; a few spiral threads develop between the suture and the first 

 spiral, and four to five between the suprasutural and the spiral above. 

 The suprasutural spiral forms a sharp keel bounding the base, which 

 is finely spirally striated ; growth-lines indistinct, siuuated. Colour 

 yellowish- white (dead shells). Spire high, conical, with straight 

 outlines. Protoconch of two smooth, strongly convex whorls. The 

 number of whorls may be 1 5 or more ; the third and fourth gradate, 

 the following two or three convex, and the rest flat, the interspaces 

 between the spirals concave ; base excavated. Suture impressed. 

 Aperture subquadrate. Outer lip sharp, with a moderately deep, 

 median, rounded sinus. Columella vertical, arcuate. Diam. 6, height 

 16 mm., immature specimen of 10 whorls only. Angle of spire 20°. 



Sab. — Near the Snares Islands, in 50 fathoms (Capt. Bollons). 



No perfect specimens. 



Miss J. Donald mentions (these Proceedings, vol. iv, p. 50) that in 

 the British Museum, Cuming Collection, there are six specimens of 

 T. sinuata, Reeve, and two from New Zealand. I have seen a good 

 many Turritellce from all parts of New Zealand, but I never came 

 across the Australian T. sinuata^ nor the Tasmanian T. quadrata, 

 Donald, either recent or fossil. If the specimens in the British 

 Museum mentioned by Miss Donald are really T. sinuata, then the 

 locality stated is most likely wrong. Type in my collection. 



53. Mathilda Neozelanica, n.sp. PL III, Fig. 53. 

 Shell minute, turriculate, spirally ridged and radially flnely striate, 

 imperforate. Sculpture : the first, embryonic, whorl with four sharp 



