THE 



JOURNAL OF MALACOLOGY. 



No. 2. June 29TH, 1905 Vol. XII. 



DESCRIPTION OF A NEW FLAMMULINA FROM 

 NEW ZEALAND. 



P.Y HKXKY SUTKI^ 

 (Plate V.) 



Flammulina (Thalassohelix) laingi, n. sp. 



PL V, figs. I— 8. 



Shell (figs. I — 3) globosely depressed, seinitransparent, smooth, imperforate, 

 with very fine close set lines of growth, which are crossed by numerous 

 microscopic spiral lirae, more distinctly visible on the base. The colour is 

 rufous-horny, whitish round the umbilical region. The epidermis is thin, 

 slightly shining. Spire but little elevated, conoidal ; the pullus consists of 

 ir, obtuse whorls, which are very faintly radiately striate, and show indis- 

 tinct microscopic spiral lines. Whorls 4, the last rapidly increasing, they are 

 flatly convex, broadly rounded at the periphery and slightly impressed in 

 the centre of the base. Suture impressed. Aperture oblique, broadly 

 lunately oval. Peristome simple, straight, outer lip rounded, ba.sal margin 

 and inner lip slightly arched, tlie latter is strongly callous above and reflexed 

 over the umbilical region, a broad thin callus unites the converging margins. 

 There is no umbilicus, not even in the young stage. 



Diam. maj. 14, min. 11.5 ; height 9 millim. 



Hah. — One adult specimen, containing the animal, and a young 

 empty shell were found on Longwood Range near Otautau, Southland, New 

 Zealand, and kindly presented to me by Mr. Rob. M. Laing, M.A., B.Sc, 

 of Christchurch, and I have much pleasure in uniting his name with the 

 species. 



Type in my collection. 



'I"his very handsome shell is most nearly allied to our Flammulina {>i. str.) 

 ronijire^sirolufa, Reeve, and also to F. ( Thalaxtiohelij- ) fordei, Brazier, from 

 Tiusmania, both of which, however, are about one-third smaller. It is 



JouRN. OF Malac, 1905, vol. xii, No. 2. 



