710 GASTROPODA. \_Pulmoiuita. 



and one just below the periphery ; the protoconch microscopically 

 striate, succeeding whorls with distinct spiral cords, separated by 

 narrow interstices ; the spirals are crossed by very fine dense growth- 

 lines. Colour black-rufous. Epidermis brown, dull, deciduous. Spire 

 short, convex, above depressed. Protoconch of 1J convex whorls. 

 Whorls 5 to 5^, convex, the last tapering, generally inclining down- 

 wards ; base convex. Suture deep. Aperture small, a little oblique, 

 lunately circular. Peristome simple, straight, margins closely united. 

 Columella vertical, arcuate. Inner lip not thickened and not reflexed. 

 Umbilicus wide, perspective. 



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



Anatomy. Suter, J. Mai., vii, 52, pi. 3, f. 4-6. 



Jaw thin and transparent, yellowish, arcuate, tapering at both 

 ends, with a sharp concave cutting-edge, vertically distantly and 

 faintly striated. 



Radula having the formula 9 + 5+1 + 5+9. Central tooth 

 tricuspid, with a short mesodont and minute side cusps. Laterals 

 tricuspid, the mesodont long, the endodont with a longer and stouter 

 cusp than the ectodont. Marginals low and wide, with longer ento- 

 cone and mesocone, united at the base. 



Reproductive Organs (Plate 1, fig. 18). The albumen-gland is small, 

 the free oviduct slightly contracted behind its middle, and the recep- 

 taculum seminis is inserted very little in front of the place where 

 the vas deferens diverges from the common ducts. The verge sac is 

 stout and rather short, the vas deferens enters in front of the posterior 

 end, where the retractor muscle is attached, and the verge sac is con- 

 tracted. 



Foot without a caudal pore. 



Type in the British Museum. 



Hub. Vicinity of Auckland, type' (Greenwood) ; Waitakerei Range 

 (H. S.). 



10. Endodonta gaza, Suter, 1909. Plate 28, figs. 2, a, b. 



Endodonta (Charopa) gaza, Sut., P. Mai. S., viii, 1909, 260, pi. 11, f. 22. 



Shell small, depressed, broadly umbilicated, radially closely costate 

 and spirally very distinctly lirate. Sculpture of the post -nuclear whorls 

 consisting of equidistant close flexuous rather low radial riblets, about 

 8-9 per millimetre, the interstices with numerous microscopic growth- 

 lines, crossed by equidistant narrow rounded spiral line, separated 

 by well-impressed linear grooves. Colour fulvous, sometimes with 

 a few radial whitish streaks. Epidermis thin, horny, not shining. 

 Spire low, broadly conoidal. in some examples, however, nearly flat. 

 Protoconch of 1| smooth convex whorls, flat, \\~horls 5|, rather slowly 

 increasing, convex, the last flat above the periphery ; base rounded. 

 future deep. Aperture oblique, subtriangular, angled above, broadly 

 rounded below. 7V/ i*t<ne sharp, the outer lip very slightly advancing 



