732 GASTROPODA. \Pubiumata. 



and semitransparent. Sculpture : Protoconch with fine spiral lines, 

 the following whorls closely radiately ribbed, about 19 per millimetre, 

 directed slightly forward ; interstices with 4 to 7 fine growth-lines. 

 dolour whitish, with a few broad streaks of pale brown at irregular 

 distances. Spire concave to about one-third of the height. Protoconch 

 of 1| whorls, convex, with fine microscopic spiral stria?. Whorls 5, 

 slowly increasing, somewhat rounded ; the first three very narrow ; 

 the fourth, much larger, rising to nearly the same level as the last 

 whorl ; the last, rising abruptly from the suture, curves a little out- 

 ward to its summit, from thence to the base it is regularly arcuate. 

 Suture very deep. Aperture vertical, crescentic. Peristome straight, 

 acute, margins convergent. Columella descending nearly vertically, 

 more widely arcuate than the upper lip. Inner lip not reflexed. Um- 

 bilicus deep, large, nearly half the diameter, showing all the volutions. 



Diameter, 1-6 mm. ; height, 0-75 mm. 



Animal unknown. 



Type lost. Co-type in my collection. 



Hob. North Island : Toko, near Stratford (R. Murdoch). 



Subsp. microrhina, Suter, 1909. 



Endodonta (G'haropa) vortex microrhina, Sut., P. Mai. S., viii, 1909, 261. 



Distinguished from the species by the following characters : The 

 shell is somewhat larger, the radial riblets less elevated and slightly 

 closer together, about 20 per millimetre, the interstices with numerous 

 fine microscopic growth-lines and excessively fine and dense spiral 

 strise. Colour white or very light horny, without any markings. 

 Protoconch smooth, no spiral lines. 



Diameter, 1-9 mm. ; height, 1-1 mm., with 5 whorls. 



Animal unknown. 



Type in my collection. 



Hob. North Island : Near Ormondville, type (Chadwick) ; Mount 

 Wellington lava-fields (Musson) ; Hunua Range (Major Broun). 



Subfam. 2. LAOMIN^E, Suter. 

 Polyplacognatha, Pilsbry. 



Jaw arcuate, composed of numerous separate rhomboidal plates, 

 more or less imbricating. 



Radula having a tricuspid or unicuspid central tooth, lateral and 

 marginal teeth bicuspid. 



This subfamily includes the genus Laoma, Gray, whose metropolis 

 is New Zealand, but a few species are also found in Tasmania and the 

 southern parts of Australia. It is strictly of southern distribution, 

 and very likely originated in New Zealand. The genus Punctum, 

 Morse, of the Northern' Hemisphere, has a similar dentition and 

 jaw. 



