SuTEK. — On N.Z. LiOi'l and Frcsh-icater Molluscs. 93 



reaching the posterior margiu of the base as they approach 

 the margin of the radula. The last two teeth much broader 

 than long, with rudimentary cusps. 



Amphipeplea ampulla, Hutt., var. globosa, n. var. Plate 



XYIII., fig. 12, a, b, c. 



Shell ovate, inflated, very thin and fragile, pale-homy, 

 faintly shining, transparent, longitudinally plaited, plaits 

 close-set and well marked. Spire short, acute, apex sometimes 

 eroded. Whorls 4, the last inflated. Suture impressed. Aper- 

 ture large, ovate, occupying about three-quarters of the length 

 of the shell ; the outer liY> not reflected, thin and sharp ; inner 

 lip very broadly reflected", covering the umbilicus. Columella 

 arcuate, with a spu'al fold. 



Dimensions : Length, Ooin. (13mm. j ; breadth, OSoiu. 

 (9mm.). Aperture: Length, 0-39iu. (10mm.) ; breadth, 0-21in. 

 (6mm.). The measures given are those for perfectly adult 

 specimens. 



Hah. South Island : Birch Hill Lagoon, Tasman Valley. 

 (H. S.) _ 



The animal is the same as in the species, and in the denti- 

 tion there is not such a difference as to justify the creation of 

 a new species. Professor F. W. Hutton kindly gave me some 

 specunens of liis -.4. awpulla, and I have thus been able to 

 compare the radulte. 



The shell differs fi-om .-1. ampulla by the more globular form, 

 the larger size, the lighter colour, and the more considerable 

 fragility and transparency. The spire is, as a rule, somewhat 

 shorter, and the reflexed portion of inner lip broader. 



This is a very variable shell, but adult specimens are always 

 nuich mi/r3 inflated than any .4. ampulla I have seen. 



[For explanation of Plates XYI.-XVUL. see end of 

 Article X.l 



Akt. X.— Miscellaneous Communications on Xew Zealand 

 Land and Fresk-xcater Molluscs. 



By H. SuTER. 



Conmiunicated by the Secretai-y. 



Read before (he PhiIosoi>hicaJ Institute of Caiiterbiiry, 6th November, 



1S90.'] 



Latia lateralis, Gould (phosphorescent). 



When h^-ing in Wellington I collected a niunber of Latia 

 lateralis in tlie Kaiwara Creek, and kept them for some time 

 alive in a glass with water. I was greatlv astonished when 



