HELIX-HELENOCONCHA. 95 



as many as six parietal lirse, as it were, in two groups of three. 

 They are very fine and extend a long way within. The plicae 

 within the outer lip vary apparently from seven or eight to ten or 

 eleven, and some of them are more prominent than others. The 

 red markings take the form of radiating blotches on the upper sur- 

 face ; and more undulating or zigzag streaks beneath. 



P. LEPTALEA Smith. PI. 36, figs. 27, 28, 29, 30. 



Shell orbicular, depressed, broadly umbilicated ; whitish, varie- 

 gated with rufous; spire slightly elevated; whorls 5, the first li 

 smooth, the rest slightly convex, very delicately arcuately striated, 

 slowly increasing ; the last whorl rounded at the periphery, hardly 

 descending in front; aperture oblique, semi-lunate; parietal lamel- 

 lae 3 (the upper and middle ones double), thin, deeply entering; 

 palatal plicae about 6. Alt. H, greater diam. 3i, lesser 3 mill. 

 (Smith.) 



Sugar loaf Quarry, St. Helena (extinct). 



Patula leptalea SM., P. Z. S. 1892, p. 264, t. 21, f. 10-10c. 



This species is much smaller than P. polyodon and not quite so 

 large as P. minutissima ; it is flatter than either, much more finely 

 striated than the latter and has a different oral armature from both. 

 The parietal liraa are unequal in size, that nearest the columella 

 being the smallest. The two others are about equal and double, 

 and between, occasionally, a very small and slender intermediate 

 lira is observable. (Sm.*) 



Unfigured species of Pitys and Endodonta. 



Pitys elisce Ancey. Sandwich Is? Bull. Soc. Mai. Fr. 1889, p. 

 180. 



Pitys hamyana Ancey. Gambier Is. Le Naturaliste, 1889, p. 

 84. 



Endodonta apiculata Ancey. Kaui, Sandwich Is. Bull. Soc. 

 Mai. Fr. 1889, p. 188. 



Endodonta garretti Ancey. Society Is. Le Naturaliste, 1889, p. 

 118. 



Pitys woapoensis Garrett. Bull. Soc. Mai. Fr. iv, p. 17, 1887. 

 Island of Woapo, Marquesas. 



Pitys octolamellata Garrett., t. c., p. 18. Dominique, Marquesas 

 Is. 



