62 Mr. H. Suter on the Relation between the 



the genera which formed ray family Phenacohelicidas (Trans. 

 New Zeal. Inst. xxiv. p. 270) in one genus, (jrerontia^ estab- 

 lishing, amongst others, a section Galymna, Hutton, for the 

 species formerly placed in the genus Amphidoxa, Hutton (not 

 Albers), and subgenus Galymna^ Hutton. For these shells, 

 however, the name of Flaramulina had been proposed in 

 1873 by von Martens (' Critical List of New Zeal. Moll.' 

 p. 12), and was adopted by Mr. C. Hedley and myself in our 

 ''Reference List" (/. c. p. 643). Gerontia should therefore 

 be replaced by Flammulina as a generic name, the former 

 dating from 1883. 



Later on Mr. H. A. Pilsbry published his " Preliminary 

 Outline of a new Classification of the Helices " (Proc. Acad. 

 Nat. Sci. Philad. 1892, p. 387 &c.), in which he unites all the 

 sections of his former genus Gerontia (including Endodontaj 

 Charopa, &c.) in one large genus Endodonta {I. c. pp. 401, 

 402). With this I cannot agree. Mr. H. A. Pilsbry was 

 under the impression that the New Zealand Endodonta and 

 Gliaro])a possess a mucous tail-gland, which is not the case. 

 I do not attach very great importance to the presence or absence 

 of the caudal gland, as we really do not know its true signi- 

 ficance ; but in the mollusks classed under Flammulina 

 the jaw is always stegognath, the radula is more or less 

 pseudo-zonitoid, and, besides, a mucous tail-gland is always 

 present 5 whilst in Endodonta and Charopa the jaw is only 

 striated, the radula is much more helicoid, and there is no 

 caudal gland. Moreover, according to the geographical 

 distribution as now known to me, the two genera Flammulina 

 and Endodonta (including Gharojja) belong to two difi"erent 

 types — Endodonta being of Polynesian^ Flammulina of Ant- 

 arctic origin. In New Zealand the Endodonta stock has been 

 immigrating from the North, the Flammidina forms from the 

 South and perhaps from the West and East also, or the latter 

 may have spread from New Zealand. 



These are the reasons which induce me to separate 

 Flammidina from Endodonta^ thus forming two well-defined 

 genera. 



Following chiefly Mr. H. A. Pilsbry [I. c. pp. 401-403) 

 I now propose the following classification of the New Zealand 

 Helicidu3 : — 



Group Haplogona. 

 Genus 1. Flammulina (v. Mortens, 1873), Suter. 



Sect. 1. Flammulina, vou Martens, 1873, s. str. (=Amphido.va, lluttou, 

 not ^Ubers). lypt' : i*'. conipressivolutaf Reeve. 



