294 Transactions. 



Art. XXXV. — JSIew Species of Tertiary MoHuaca,. 



By Henry Suter. 



[Bead before the Philosophical Institute of Canterbury, 4th December, 1912.] 



Plates XII-XIV. 



Dr. p. Marshall and Mr. R. Speight sent me a number of New Zealand 

 Tertiaiy fossils they had been collecting for examination, and amongst 

 them I found a number of species I consider to be new to science, and the 

 most important ones are described hereafter. Of quite especial interest 

 is the occurrence of the subgenus Perrona in a form very nearly allied to a 

 species of the Pliocene of French India. 



I am much obliged to the two gentlemen for bearing the cost of photo- 

 graphing the type specimens. 



Polinices ambiguus sp. nov. 



Shell small, rotundly ovate, with spiral lines, umbilicus covered up in 

 the adult, suture impressed. Sculpture consisting of inequidistant fine 

 spiral cords, fine microscopic Imes in the 

 interspaces, crossed by oblique flexuous 

 growth-lines. Sfire broadly conoidal, about 

 one-third the height of the aperture. Proto- 

 conch of one papillary whorl. Wfiorls 5, 

 first slowly increasing, but the last rather 

 large ; they are convex, the body -whorl 

 slightly flattened below the suture, base 

 narrowed. Suture deep, but not canalicu- 

 late. Aperture oblique, narrowly ovate, 

 slightly effuse below. Outer Up thin and 

 sharp, convex ; the basal lip narrowly 

 rounded. Columella short, arcuate. Inner 

 lip rather broad, not very callous, with a 

 distinct pad below the suture; umhilicus Pohnices ambiguus ,- x 3^ 

 slightly open in young specimens, but completely closed up in adult 

 shells. 



Height, 13 mm. ; diameter, 10-5 mm. (holotype). 



Hololype and 2 paratypes in the Canterbury Museum, Chris tchurch. 



Locality. — Hundalee, Amuri Bluff (R. Speight). Pliocene. 



RentarJc. — The Spiral ornamentation and deep suture approach this 

 species to P. suturalis Hutton. 



Clavatula (Perrona) neozelanica sp. nov. Plate XII, fig. 3. 



Shell rather large, fusiform, imperforate, with scalar spire, narrowly 

 excavated shoulder, spirally lirate, with a somewhat shallow, broadly 

 rounded labial sinus on the shoulder and extending over the keel. Sculpture 

 of narrow spiral cords, flattish, separated by linear interstices, getting broader 

 and more conspicuous upon the base ; they are crossed by oblique fine growth- 

 lines. Spire conical, gradate, of the same height as the aperture without 

 canal ; angle 45°. Protoconch obtuse, slightly tilted. Whorls %\, the last 

 large and somewhat ventricose, with a rounded keel, narrow and concave 



