236 



DESCRIPTIONS OF NEW NON-MARINE SHELLS FROM 

 NEW ZEALAND. 



By Henky Sutee. 



Bead Wth January, 1907. 



PLATE XXII. 



1. Laoma (s.s.) p(ecilosticta (Pfr.), n.subsp. conicdla, 

 PI. XXII, Figs. 1, 2. 



Shell small, dome-shaped, imperforate, radially finely costate, suture 

 margined, last whorl keeled, with a columellar plait. Sculpture 

 consists of close, rounded, flexuous, radiate plications, extending over 

 the base ; the latter is microscopically closely and finely spirally striate. 

 Colour fulvous, with rather faint longitudinal ziczac bands of rufous ; 

 margins of suture and keel on the last whorl with whitish dots. 

 Epidermis thin, shining. Spire dome-shaped, with a blunt rounded 

 apex. Protoconch formed by 1^ smooth, flatly convex whorls ; 

 a magnifying power of 100 diam. reveals faint spiral striation. 

 "Whorls 6, slowly increasing, flatly convex, as is also the base. Suture 

 impressed, margined above on the last four whorls with a distinct 

 thread. Aperture a little oblique, angularly lunate, breadth about 

 twice the height. Peristome simple, straight, outer lip but little 

 convex, forming a distinct angle with the slightly rounded basal lip. 

 Columella callous, oblique, with a not much pronounced plait. 

 Umbilical region showing but a faint impression, no perforation 

 whatever, not even in young examples. Alt. 3-2, diam. 3 mm. 



Hah. — One specimen, the type, I received some years back from 

 Mr. Strickland, who collected shells in this colony for some time, and 

 who found it near Kaihu, Hokianga. I also found specimens in the 

 bush near Waiwera. 



This subspecies is distinguished from L. pcecilosticta, of which for 

 comparison the outlines are figured (Fig. 2), by the dome-like spire, 

 the absence of an umbilicus, and the presence of very distinct spiral 

 striation upon the base. Young specimens of L. pcecilosticta are 

 distinctly umbilicated, but adult specimens have the perforation mostly 

 more or less sealed up ; spiral striation on the base is faintly visible 

 only under a very strong lens. Type in my collection. 



2. Laoma (Phrixgnathus) filicosta, n.sp. PI. XXII, Fig. 3. 



Shell minute, turbinate, imperforate, fulvous with fuscous radial 

 streaks and distant riblets. Sculpture consists of very fine and oblique 

 flexuous costae, about 8 to 10 per raillim. ; they are sharp, thin, mem- 

 branous, white, and extending over the base to the umbilical region ; 



