f>88 GASTROPODA. [Pulmonata. 



Animal unknown. 



Type in Pommersches Museum, Stettin. 



Hob. North Island : Whangarei (Musson) ; Auckland and Mount 

 Wellington lava-fields ; Wade ; Thames ; Hunua Range (Major 

 Broun) ; Ohaupo (Musson) ; Waiuku (Webster) ; Mount Pirongia ; 

 Kaiti, Gisborne (A. Hamilton); Mount Egmont, 3,000ft. to 4,500ft. 

 (K. Murdoch) ; Forty-mile Bush (H. 8.) ; Kaponga ; Eltham ; Horo- 

 kiwi. South Island : Kenepuru (McManon) ; Happy Valley, Stony- 

 hurst (F. Suter). 



Remarks. Webster says that the lamella on the parietal wall in 

 T. mira is bifid. This is an optical illusion, as in nearly all specimens 

 of E. tau I have examined this highly raised arched lamella appears 

 to be bifid, the effect being produced by an oblique white line in the 

 lamella. When the outer wall is removed it will be seen, however, 

 that the lamella is simple. I fail to see anything in Webster's diag- 

 nosis and figure which would justify the separation of T. mira from 

 E. tau. The lamella on the outer wall is not always present, but indi- 

 cated always by a callous patch. 



5. Endodonta varicosa, Pfeiffer, 1853. Plate 27, fig. 3, a, b. 



Helix varicosa, Pfr., M.H. Viv., iii, 1853, 97 ; P.Z.S., 1852 (1854), 148 ; 

 Reeve, Conch. Icon., vii, p!. 133, f. 824 ; Tryon, Struct, Syst. Conch., 

 iii, pi. 3, f. 10; Hector, Cat. Land Shells, N.Z., 11. Patv.la (Charopa) 

 varicosa, Pfr., Nomencl. Hel. Viv., 97. P. varicosa, Pfr. : Hutton 

 M.N.Z.M., 7; T.N.Z.I., xvi, 192; Tryon, Man. Conch. (2), iii, 23, 

 pi. 3, f. 10. Endodonta varicosa, Pfr. : Suter, T.N.Z.I., xxvi, 128, pi. 15, 

 f. 12 ; Hedley and Suter, P.L.S. N.8.W. (2), vii, 651. E. (Thavmatodon) 

 varicosa, Pfr. : Suter, J. de Conch., xli, '2~>1. 



Shell small, discoidal, umbilicated, distantly radially costate, not 

 shining. Sculpture on the post-nuclear whorls consisting of radiate 

 distant riblets, 3 to 4 per millimetre, in front of the aperture, usually 

 much more distant on the last half of the body-whorl ; they are strongly 

 sinuated on the upper surface, almost straight below ; interstices with 

 minute crowded growth-striae, crossed by indistinct close microscopic 

 spiral lines. Colour brown, irregularly mottled with whitish. Spire, 

 flattish, depressed in the centre, the penultimate whorl slightly raised. 

 Protoconch very small, of H convex whorls. Whorls 4J to 5, slowly 

 increasing, convex, periphery and base rounded. Suture deep. Aper- 

 ture small, oblique, lunar, within with a thin high lamella on the middle 

 of the parietal wall. Peristome simple, straight. Columella short and 

 arcuate, the lip slightly reflexed above. Umbilicus wide, perspective, 

 about one-third of the greatest diameter. 



Diameter Maj., 3-5 mm. ; min., 3-25 mm. : height, 2 mm. (type). 



Dentition (Suter, P.L.S. N.S.W. (2), viii, 493, pi. 22, f. 7). Radula 

 having the formula 13 to 15 + 1+ 15 to 13 ; laterals 3, and transition 

 teeth the same number. Central and lateral teeth tricuspid ; marginals 

 with 3 or 4 cutting-points. 



