HELIX. 81 



H. pyxis HINDS, Voy. Sulphur, Moll, in, p. 55, t. 19, f. 10. PFR., 

 Monogr. i, p. 219 ; iii, p. 180 ; Zeitschr. f. Mai. 1849, p. 76 ; Conchyl. 

 Cab., p. 293, t. 125, f. 12, 13. REEVE, f. 793. 



This is a very pretty little shell, the smallest of the H. helicinoides 

 group. It further differs from the others in its white color, globose 

 form, convex whorls, and rounded mouth. The characters of the 

 eolumella, however, show unmistakably that pyxis is correctly 

 grouped here. 



H. CRUCIBULUM Pfeiffer. Unfigured. 



Imperforate, trochiform, rather solid, covered with a greenish- 

 tawny epidermis, partly removed ; spire regularly conic, rather 

 acute; suture margined; whorls 6*, the upper a little convex, 

 irregularly striate, the last smooth, not descending, provided with 

 an acute, delicate carina ; base more convex, shining, impressed in 

 the middle ; aperture oblique, ax-shaped ; peristome straight, mar- 

 gins distant, the upper acute, labiate with white within behind the 

 edge, basal margin white callously thickened. 



Alt. 10, greater diam. 13i, lesser 12* mill. (P/r.) 



A dmira Ity Is lands. 



H. crucibulum PFR., Mai. Bl. iii, p. 241 ; Mon. Hel. Viv. iv, p. 

 192. 



I do not know where to group this unfigured species. 



* , * 

 * 



II. Species doubtfully referred to Papuina, inhabiting southeastern 

 Asia, Andaman Is., Java and Sumatra. 



The species included here agree with Papuina in general form, 

 but differ in texture and usually also in surface-sculpture and color- 

 ing. In shell characters they approach a number of quite diverse 

 groups, so that until the anatomy is investigated we will remain 

 ignorant of the true classification of some of them. Subgeneric 

 names have been proposed for several of the species. 



Under the circumstances it seems best to group them in this place 

 temporarily. I have indicated, however, under each group my im- 

 pressions as to its affinities and correct systematic position. 



(1) GROUP OF H. PERAKENSIS. 



Thin, straightly conical, carinated species, having decided affinities 



to the section Satsuma, a portion of them certainly belonging there. 

 6 



