HELIX-LAOMA. 63 



L. PUMILA Hutton. PL 23, figs. 97, 98, 99. 



Shell minute, sub-discoidal, umbilicated, thin, translucent, smooth, 

 scarcely shining, with distant plait-like ribs ; color horny brown. 

 Spire slightly convex; whorls 4, increasing rather rapidly, rounded 

 with regular, distant membraneous ribs, about 20 to 25 in the tenth 

 of an inch, the interstices finely reticulated ; suture impressed ; 

 umbilicus rather large, about one-fourth the diameter of the shell, 

 gradated, pervious ; aperture large, rather oblique, subcircular, 

 broader than high; peristome thin, regularly arched, the columellar 

 margin slightly reflected. (Hutf) 



Alt. -75, diam. 1'75 mill. 



Eyreton, N. Canterbury, and Christchurch, New Zealand. 



Microphysa (f) pumila HUTTON, Trans. N. Z. Inst. xv, p. 134, 

 1882 ; 1. c., xvi, p. 195. Phrixgnathus pumilus SUTER, in lit. 



This species has much the aspect of Patula, but it is referred by 

 Mr. Suter to Phrixgnathus. 



L. MICRORETICULATA Suter. PL 23, figs. 13, 14, 15. 



Shell very small, globosely elevated, horny-fulvous, shining, very 

 thin, pellucid, finely striated, reticulated between the striae. Spire 

 conical, elevated. Whorls 5, rounded, regularly increasing. Suture 

 impressed. Aperture oblique, rotundly lunar, but little excavated 

 by the penultimate whorl. Peristome straight, acute, margins 

 faintly convergent ; columellar margiu somewhat reflected, descend- 

 ing straight. Umbilicus narrow, deep. 



Diameter O07 in. (17 mm.), height O05 in. (T3 mm.). (Suter.) 

 Badwellj Forty-mile Bmh> N. Island, New Zealand. 



Hyalina microreticulata SUTER, Trans. N. Z. Inst. xxii, 1889, p. 

 227, t. 15, f. 13a, b. Phrixgnathus microreticulata SUTER, in lit. 



L. ALLOCHROIDA Suter. PL 23, figs. 3, 4, 5, 6. 



Shell very small, depressed ; the first three whorls colorless, the 

 penultimate yellowish-horny, and ihe last horny-fulvous; very thin, 

 pellucid, with distant fine ribs, directed backwards on the surface 

 and somewhat arcuated on the side; about 30 ribs in the tenth of 

 an inch (12 per mm.). Distinctly reticulated between the ribs. 

 Spire slightly elevated. Whorls 5, swollen, regularly increasing, 

 the last not descending. Suture deep. Aperture slightly oblique, 

 rotundly lunar, little excavated by the penultimate whorl. Peri- 

 stome straight, acute, margins convergent, columellar margin 



