MURDOCH : NEW ZEALAND MOLLTJSCA. 323 



ectocone increasing somewliat in length ; marginals with numerous 

 denticles, a small and a large point forming, as it were, a double denticle 

 on the inner side of each tooth, except the last, which is bidentate. 



Genitalia (Fig. 11). — The penis [p] is comparatively large and long, 

 the upper half more slender, with the vas-deferens {v.d.) and retractor 

 muscle inserted at the apex. The hermaphrodite gland iji.g.) consists 

 of several small clusters of follicles imbedded in the liver; albumen 

 gland {al.g.) large. The most interesting feature is a small sack-like 

 lobe {x.), which partly envelops the uterus ; it rises from the uj)per 

 part of the free tube of the oviduct, passes upwards as a blind sack 

 with the. prostate branching from the side ; the vas-deferens enters the 

 wall of the oviduct a little below its base ; whether it is a peculiar 

 enlargement of the prostate or not, I have been unable to determine, 

 but propose to give a more detailed description in a future paper (it 

 appears to be a characteristic feature in Laoma, Flammulina, and 

 Endodontd) ; the spermatheca {spr.') branches from the oviduct about 

 midway between the enveloping lobe and genital cloaca, it is long and 

 tapering, terminating above in a small oval-shaped sack. 



6. Plammulina (Phenacohelix) ltjcetta (Hutton). 

 PI. XVI, Pigs. 12-14. 



Patula lucetta, Hutton: Trans. New Zealand Inst., vol. xvi (1884), 



p. 192. 

 Helix {Patula) Stokesi, Smith : Proc. Zool. Soc, 1884, p. 275, 



pi. xxiii, figs. 17-173; Tryon, Man. Conch., ser. ii, 



vol. iii, p. 262, pi. xxii, figs. 48-50. 

 Helix lucetta (Hutt.) : Tryon, Man. Conch., ser. ii, vol. iii, p. 22, 



pi. iii, figs. 7-9. 



The investigation of the jaw and dentition of this species proves 

 that it is not an Endodonta, as referred in recent classifications. 

 Capt. Hutton originally described it as Patula lucetta ; the name first 

 appears on p. 162, Trans. ISTew Zealand Inst., xvi, with a description 

 of animal, jaw, and dentition, including a figure of the latter and 

 brief note on the shell. This reference cannot apply to the true 

 P. lucetta^ the jaw and dentition seem not unlike Charopa coma, Gray, 

 and in all probability should be referred to the var. globosa, Sater, of 

 that species. The error might readily occur, since the shell and colour 

 pattern of certain forms of C. coma very much resemble Flammulina 

 (P.) lucetta. The type-specimens of the latter are preserved in the 

 Canterbury Museum, New Zealand. 



The animal has the characteristic supra - pedal grooves, a narrow 

 foot, and caudal mucous pore with small papilla. 



Jaio (Pig. 12). — Consists of about thirty -three narrow plates, 

 slightly overlapping at the sides, and indenting the concave margin ; 

 under a high power they are seen to be strengthened by transverse 

 waved striae. 



Pentition (Pig. 13).— Has the formula 26-1-26 or 8-18-1-18-8, 

 varying from 7-17-1-17-7, in numerous transverse, nearly straight 



