Otoconcha.] i; ASTUoruoA. 621 



Dentition. -Hutton, T.N.Z.I., xvi, 166, pi. 9, f. Y; pi. 11. f. 0: 

 Suter. I.e., xxvi, 131, pi. 18, f. 28 ; pi. 19, f. 29. 



Jaw arcuate, with a projecting rostrum at the cutting-edge; vertically 

 channelled or furrowed by the action of the teeth of the radula ; cutting- 

 edge deeply and irregularly denticulated. Sometimes the jaw forms 

 only a narrow ledge with Wnt inferior denticulations. being quite 

 worn off by the action of the radular teeth. 



Radula with the formula 26+1 + 26. Central tooth rectangul.-u . 

 tricuspidate, the mesodont long, the side cusps small ; lateral teeth 

 about 5, tricuspidate, the mesocone long and oblique ; intermediate 

 teeth with only a strong and long mesocone, which becomes gradually 

 shorter, then an ectocone is developed, and finally the base becomes 

 narrow and transverse ; an entoconc also appears. 



T-I//X- in the British Museum. 



Hab. North Island : Whangarei (A. Suter) : Auckland (Cheese- 

 m;ui) : Thames (Adams) ; Hawke's Bay (Colenso) ; Forty-mile Bush 

 (H. S.) ; Waii'ianm (Murdoch) ; Wellington (T. \V. Kirk). South 

 Island : Kenepuru (McMahon) ; Dyer's Pass, near Lyttelton (H. S.) : 

 Hossack Downs. Canterbury (E. Suter) ; near Reefton (Cavell) : near 

 Lake Tc Aii.-iu (Dr. Dendy). 



fir-marks. When at rest the tail is brought forward beside the 

 visceral hump and head, and the same position is also assumed by 

 Vitrinoidea. 



['Jim. PHENACOHELICID-iE, Suter, 



< 'haropidce, Hutton, T. N.Z.I., xvi, 199. Phenacohelicidce, Suter, T.N.Z.J., 

 xxiv. 270 : Moellendorff, N.D.M.G., xxxi, 1899, 22. 



Am'mal mostly spirally coiled, heliciform ; foot with a peripodial 

 groove, and diagonal lateral grooves ; tail with a mucous pore. Jaw 

 generally flatly plaited. The marginal teeth of the radula show all 

 intermediate forms from aculeate to quadrate, but even in the latter 

 case some of the cutting-points aro usually very long. Reproductive 

 organs simple. 



Shell generally heliciform, flat or elevated, umbilicate or iruper- 

 I orate ; peristome acute; aperture without lamella' ; surface smooth 

 or ribbed, seldom hairv. 



Distribution. New Zealand, Tasmania, southern and eastern pa,ri < 

 of Australia, Auckland and Campbell Islands. New Caledonia. Caro- 

 lines, Kerguelen. Seychelles, South Africa. South America. Lord Howe 

 I sland. 



The New Zealand species belong to what Prolc-sor Dendy verv 

 appropriately called the " eryptozoic ' fauna, living hidden in the 

 bush under rotten logs, bark, dead leaves, and sometimes under stones. 



Besides the eleven genera found in New Zealand, the following 

 genera should be included in this family : Hedleyoconcha. Pilsbry ; 

 Pilula, Martens ; Trachycystis, Pilsbry ; and most likely also Amphi- 

 doxa. Albers. 



