Endodonta.} GASTROPODA. 711 



and straight above the periphery, sharply rounded on meeting the 

 broadly convex basal lip. Columella short, arcuate. Inner lip lightly 

 callous, but little reflexed above, and spreading as a white smooth 

 callus over the convex parietal wall. Umbilicus wide, perspective, 

 diameter 1-7 mm. 



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



Animal unknown. 



Type in my collection. 



Hal. 'Big King, Three Kings Islands (Captain Bollons). 



11. Endodonta transenna, Suter, 1904. Plate 28, figs. 3, a, b. 



Endodonta (Gharopa) transenna, Suter, P. Mai. S., vi, 1904, 156, f. 4-6 in 

 text. 



Shell small, subdiscoidal, umbilicated, whitish with irregular streaks 

 of chestnut, finely ribbed, with distinct revolving threads on base. 

 Sculpture : The post-embryonic whorls are finely radially ribbed, the 

 riblets low and undulating, about 18 per millimetre ; interstices with 

 tine growth-lines, which are reticulated by spiral stria?, the latter 

 distinctly visible on the base ; protoconch having a smooth nucleus, 

 but the following half-turn is microscopically decussate. Colour nearly 

 white, with irregular streaks and blotches of chestnut on the upper 

 surface ; from the periphery down to the base there is a change in 

 colour-pattern, smaller and zigzag lines predominating. Spire flat and 

 very little raised above the last whorl. Protoconch of 1^ convex 

 whorls. Whorls 5, at first very slowly then more rapidly and regularly 

 increasing, convex ; periphery and base rounded. Suture well im- 

 pressed. Aperture slightly oblique, roundly lunate. Outer lip regu- 

 larly arched, sharp. The columella and inner lip arcuate, very little 

 thickened, and not reflexed. Umbilicus wide, perspective ; diameter 

 1-2 mm., or somewhat less than one-third of the greater diameter of 

 the shell. 



Diameter Maj., 3-2 mm. ; min., 2-9 mm. : height, 1-4 mm. 



Animal unknown. 



Type in my collection. 



Hal. Waitakerei Range, near Henderson (H. S.). 



Remarks. Unless closely examined, this species may easily be 

 taken for E. anguiculus or E. maculata, but it can at once be separated 

 from both by the distinct spiral threads on the base. 



3. Group of Endodonta infecta. 



Shell with radial riblets, protractive above the periphery and 

 retractive toward the suture. Spire flattish ; umbilicus wide, per- 

 spective. Peristome retracting at the suture, forming a distinct sinus, 

 advancing above and at the periphery. Protoconch radially striate ; 

 sometimes smooth in E. tapirina and sulinfecta. 



