SuTEE.— 0«: N.Z. Land and FresJi-tcater Shells. 229 



the last rather descending. Aperture very obHciue, rotundly 

 kinar, httle excavated by the penuhimate whorh Peristome 

 straiglit, acute, margins convergent ; cohimellar margin slightly 

 reflected, accurately bent downwards. Umbilicus open, deep, 

 about one-fifth of the diameter. 



Diameter, 0-06in. (1-onnn.) ; height, 0-Oiin. (Innn.). 



Hub. Amongst dead leaves and mould in the bush. North 

 Island: Eortv-mile-Bush ; Hastwell. (H. S.) 



Limnaa alfredi, n. sp. Plate XY., fig. 17, ti. 



Shell oblong, glossy, extremely thin and fragile, horn- 

 coloured, semi-transparent, lougitudinally plaited. Apex 

 blunt, very often eroded. Whorls 4, rather flattened. Suture 

 deep. Aperture ovate, more than half the length of the shell. 

 Peristome simple ; the outer lip thin, not reflected ; the inner 

 lip slightly callously reflexed, covering the umlnlicus. Colu- 

 mellar plait very small. 



Specimens from Governor's Bush Creek : Length, 0-3in. 

 (7-5mm.) ; diameter, 0-16in. (-imm.) ; aperture — long 0-18iu. 

 (4-5mm.), broad 0-12in. (3mm.). 



Specimens from Birch Hill Lagoon : Length, 0-37in. 

 (9-5mm.) ; diameter, 0-2in. (5mm.). 



Hab. On stones and sand, covered with Alja'. South 

 Island : Small creek from Governor's Bush (near Alount Cook 

 Hermitage) ; Birch Hill Lagoon (seven miles from Hermitage). 



Under the influence of the atmosphere the organic part of 

 the shell gets easily decomposed, and the shell becomes so 

 fragile that it hardly can be touched without breaking. I 

 think the water coaatains very little carbonate of lime. I give 

 it the name of my son Alfred, who discovered this shell near 

 Governor's Bush. 



EXPLANATION OF PLATES XIV. AND XV. 



Plate XIV. 

 Fig. 1. a, h. HclLv pscndolcioda. 



„ c. Its aperture, showing disposition of lamcllip. 

 Fig. 2. a, b. Helix n-airaraim. 



c. Its aperture, with lameHaj. 

 Fig. 3. a, b. Helix hectori. 



c. Its aperture, with lamellcB. 

 Fig. 4. a, b. Helix micronndulata. 



c. Its aperture, and lanielho. 



d. Part of the shell, showing the ribs and brown streaks. 

 Fig. 5. a, b. Helix aorangi. 



c. Its aperture, and lamcllip. 



Fig. (j. rt, b. Patnla infecta, var. irreijularis. 



Fig. 7. a, b. P. colensoi. 



Fig. 8. a, b. F. variecostata. 



c. Showing the arrangement of the ribs. 



Fig. 9. a, b. Patnla raricostata. 



