484 THE LAND AND FRESII-WATER MOLLUSCA OF NEW ZEALAND, 



ADDITIONS AND EMENDATIONS TO THE 

 KEFERENCE LIST OF THE LAND AND FRESH- 

 WATER MOLLUSCA OF NEW ZEALAND. 



By Henry Suter, Christchurch, New Zealand. 



(Communicated by C. Hedley, F.L.S.) 



(Plates xxn. XXIII.) 



In the above-mentioned list a number of new species were 

 enumerated, the descriptions of which were promised for the next 

 volume of the Proceedings. These are given herewith, accom- 

 panied by figures of the shells, and, where it was possible, of the 

 dentition also. There were a few of our shells whose identification 

 seemed to me more or less doubtful, and these I forwarded to the 

 respective museums where the type specimens aie preserved, and 

 the gentlemen in charge most obligingly undertook the verification 

 of the specimens, for w^hich kindness my best thanks are due to 

 them. I now wish to place all the reports on record, as they are 

 no doubt of the greatest importance. 



Lagochilus Hedleyi, n.sp. 

 (PL xxn. figs. \-\d.) 



Shell small, turbinate, perforated, rufous or pale horny, not 

 shining, rather thin, with radiate white membranaceous plaits, 

 wliich are close together on the penultimate whorl, but are 

 gradually becoming more distant on a[)proaching the aperture, 

 where there are about 9 plaits per millm. Between the plaits 

 the epidermis is faintly spirally striated, crossed by a few growth- 

 lines ; the spiral striae are very close and can only be seen with a 

 good magnifying glass. Spire conical, nearly as high as broad ; 

 apex subacute, smooth. Whorls 5, rounded, the first four slowly, 

 the last rapidly increasing. Suture deep ; periphery rounded, 



