THE 



JOURNAL OF MALACOLOGY. 



No. 4. December 24th, 1902. Vol. IX. 



DESCRIPTION OF A NEW SPECIES OF GOMPHINA 

 FROM NEW ZEALAND. 



By EDGAR A. SMITH, F.Z.S. 



Mr. William H. Webster of Auckland, New Zealand, has very kindly 

 presented to the British Museum specimens of the Bivalve about to 

 be described, also an oyster attached to part of a Haliotis, and a 

 specimen of the rare Unio (Diplodon) websteri of Simpson, from 

 Waiuku, New Zealand. The oyster is only about 16 millim. in diam- 

 eter, and may very possibly be merely the young state of a fairly 

 large species. As it possesses no striking features, and considering 

 the variability of oysters generally, it seems to me unadvisable, at all 

 events until more material is available, to attempt to name or 

 describe it. 



Gomphina maorum, n.sp. 



Testa aequivalis, inaequilateralis, solidiuscula, ovato-trigonalis, medio- 

 criter convexa, alba, fusco biradiata, lineisque zigzag-formibus fuscis 

 irregulariter picta, ad umbones plus minus rufescens ; latus anticum 

 acute rotundatum, posticum brevius ; margo dorsi posterior valde 

 descendens, parum arcuatus, anterior longior, minus obliquus, vix 



JouRN. OF Malac, 1902. vol. ix, No. 4. 



