350 Transactions. 



tinctly contracted. Suture impressed, margined below. Aper- 

 ture narrow, rather broadly angled above, with a short widely 

 open and slightly recurved canal below, its base slightly notched. 

 Outer lip thin and sharp, lightly convex, contracted below. Colu- 

 mella subvertical, with 4 equally spaced and slightly oblique 

 plaits, which decrease in size towards the base ; the uppermost 

 plait continued as a strong riblet over the neck ; inner lip thin 

 and narrow, spreading over the concave parietal wall. 



Diameter, 2-5 mm. ; height, 7 5 mm. Pliocene type of 

 6i whorls. 



Diameter, 2-5 mm. ; height, 6-2 mm. Recent example of 

 5 whorls. 



Type in the Canterbury Museum, Christchurch. 



A number of specimens were obtained. 



V. marginata, n. subsp. angulata. 



Distinguished from the species by the following characters : 

 The shell is slightly more ventricose, all the whorls below the 

 protoconch distinctly shouldered, the axial costae somewhat 

 nodulous upon the carina ; the spiral lirse are much more nume- 

 rous, and consequently finer ; the suture is undulating, more 

 or less distinctly margined below, but the two more prominent 

 cinguli are wanting ; the outer lip is angled above. 



Diameter, 2-5 mm. ; height, 5 - 5 mm. Specimen of 5 whorls. 



Type in my collection. 



A few specimens ; apparently more rare than the preceding 

 species. 



25. Siphonalia nodosa (Martyn). 



Buccinum nodosum, Mart., Univ. Conch., vol. i, 1784, fig. 5. 



A few quite young specimens, with perfect apex. 



26. Nassa suturalis dunkeri, n. n. 



Nassa intermedia, Dunker, Verh. Zool. Bot. Ges. Wien, vol. xvi, 

 1866, p. 909 (not of Forbes). 



Dunker's species being generally accepted as a subspecies 

 of Nassa suturalis, Lamarck, but his name being preoccupied 

 in the genus, I propose the above name. 



One specimen was obtained. 



'-'7. Trophon ambiguus (Philippi). 



Fusu8 ambiguus, Phil., Abbild. und Beschi. ueuei Conch., Fusus, 

 1844. pi.' i. fig. 2. 



Two young specimens of • > whorls and perfect apices. 



