18G Transactions. — Zoology. 



Plate X. — continued. 



Fig. 1. Omphicardelus costellaris. Teeth X 470. 



2. Molis leptosoma. Teeth x 160. 



3. Euthria striata. Teeth X 280. 



4. „ flavescens. Teeth x 280. 



5. Acmcea cingulata. Teeth X 100. 



Art. VIII. — Revision of the Land Mollusca of New Zealand. 

 By Captain I\ W. Hutton. 



[Read before the Philosophical Institute of Canterbury, 2nd August, 1883.] 

 In the following pages I have attempted to arrange the New Zealand Land 

 Mollusca into something like natural groups. Of course any classification 

 must at present be very imperfect as the animals of a large number of the 

 species are as yet unknown, but I hope that the present will be found a 

 useful contribution towards a monograph. 



I have to tender my best thanks to several friends, especially Mr. R. 

 Helms, Mr. T. F. Cheeseman, and Mr. Adams of the Thames, for sending 

 me specimens either alive or in spirit. I have also to thank Dr. von Haast 

 for allowing me to examine the collection in the Canterbury Museum ; 

 Professor T. J. Parker for allowing me to examine the collection in the 

 Otago University Museum ; Dr. Hector for having with great liberality lent 

 me the whole of the collection in the Colonial Museum, at Wellington ; and 

 Mr. Justice Gillies for sending me from Auckland his private collection for 

 examination. If it had not been for the assistance I have thus received I 

 should have found it impossible to identify many of the described species ; 

 but the ample collections that have passed through my hands from nearly 

 all parts of New Zealand, have enabled me to determine satisfactorily all 

 but a very few, as well as to indicate fairly their distribution in the islands. 

 I have not thought it advisable to dismiss from our list any of the species 

 ascribed to New Zealand. H. reinga, H. taranaki, and H. rapida are very 

 probably New Zealand species, although no specimens exist in any of our 

 collections. Gerontia cordelia, mihi, has, I think, been mistaken for H. 

 tiara. Hyalina corneo-fulva, Pfeiffer, is certainly H. cellaria. I am not 

 satisfied with my identification of H. guttula, Pfr., as the shell in the Wel- 

 lington Museum exceeds the dimensions given by Pfeiffer, and it can hardly 

 be called thin, but in other respects it corresponds well with the description, 

 and with Reeve's figure. Succinea tomentosa is omitted because an examina- 

 tion of the animal proves it to be a fresh-water species belonging to Amphi- 

 peplea. Patula varicosa is the only shell I feel very doubtful about. Pfeiffer 

 says that it was collected by Strange, in which case it probably belongs to 



