Laoma.] GASTROPODA. 751 



base flattish. Suture simple, deep. Aperture a little oblique, de- 

 pressed, subangularly lunate. Pcristome simple, straight, sharp. 

 Outer lip roundly angled. Columella short, vertical, arcuate. Inner 

 lip subcallous, somewhat reflexed. Umbilicus narrow, deep, open, its 

 diameter about one-sixth of the greatest diameter of the shell. 



Diameter, 2-5 mm. ; height, 2 mm. 



Animal unknown. 



Type in the British Museum. 



Hob. North Island : Auckland, type (Greenwood) ; Waitakerei 

 Range (H. S.) ; Hillyer's Creek ; Mount Wellington lava-fields ; 

 Ohaupo (Musson) ; Waiheke Island (H. S.) ; Howick ; Hunua Range 

 (Major Broun) ; Thames (Adams) ; Tuakau ; Mount Pirongia (Urqu- 

 hart) ; Waimarama (A. Hamilton). 



Very often found on leaves of Astclia. 



20. Laoma fatua, Pfeifier, 1857. 



Helix fatua, Pfr., P.Z.S., 1857, 107 ; M.H. Viv., iv, 30 ; Hector, Cat. Land 

 Moll. N.Z., 15 ; M.N.Z.M., 19. Laoma (Phrixgnathus) fatua, Pfr. : 

 Hedley and Suter, P.L.S. N.S.W. (2), vii, 650 ; Suter, J. de Conch., xli, 



277. 



Shell perforated, turbinated, thinnish, irregularly finely striated, 

 somewhat shining, fulvous. Spire conoidal, rather acute. Whorls 

 5-5|, moderately convex, the last not descending ; periphery sub- 

 carinated, rather convex at the base. Aperture a little oblique, lunar. 

 Peristome simple, straight. Columellar margin somewhat rigidly bent 

 downwards. (Pfeiffer.) 



Diameter Ma]., 5 mm. ; min., 4-5 mm. : height, 2-3 mm. 



Type in the British Museum. 



Hob. North Island : Taupiri (Hochstetter). 



Remarks. I have not seen this species. In the Canterbury Museum 

 there are two specimens labelled " Phrixgnathus fatua, Pir.," by the 

 late Captain Hutton. They are identical with my Laoma Trailli, 

 which I consider to be distinct from L. fatua, though no doubt nearly 

 allied. 



21. Laoma glabriuscula, Pfeiffer, 1853. Plate 29, fig. 21. 



Helix glabriuscula, Pfr., P.Z.S., 1851 (1853), 262 ; Conch. Icon., vii, pi. 133, 

 f. 822; Conch. Cab. (2), i, 470, pi. 156, f. 14-16; M.H. Viv., iii, 51 ; 

 Hector, Cat. Land Moll. N.Z., 6. Part/ phanta glabriuscula, Pfr. : Hutton, 

 M.N.Z.M., 23. Phrixgnathus glabriuscula, Pfr. : Hutton, T.N.Z.I., xvi, 

 37. Helix (Phrixgnathus} glabriuscula, Pfr. : Man. Conch. (2), iii, 37, 

 pi. 21, f. 14. Laoma (Phrixgnathus) glabriuscula, Pfr. : Hedley and 

 Suter, P.L.S. N.S.W. (2), vii, 650 ; Suter, J. de Conch., xli, 276. 



Shell very small, conoidly semiglobose, perforate, thin, smooth, 

 pellucid, shining. Sculpture microscopic, the post-embryonic whorls 

 with fine growth-lines, decussated by fine spirals, which are stronger 

 on the base. Colour pale yellow, angularly lined with rufous. Spire 



