GYLIAUCHEN. 217 



fleeted, thin at the edge, and rather strongly calloused within, 

 the teeth being placed further inward than the callous. 



Alt. 2.75, greatest diam.. 3.6 mm. 



Alt. 2.55, greatest diam. 3.5 mm. 



5a. G. c. endodonta Mlldff. 



Umbilicus a little wider, spire a little less elevated, apex 

 more oblique, last whorl a little less free, teeth much more 

 deeply placed. Diam. 3.4, alt. 2.3 mm. (Mlldff.). 



Tonkin: Lang-son (Fruhstorfer). 



5&. G. c. brevituba Mlldff. 



Last whorl very much more shortly free, spire higher. 

 Diam. 3.1, alt. 2.5 mm. (Mlldff.). 



Series of G. everetti. 



Surface spirally striate ; space between the upper and lower 

 palatal plica? flat, not excavated. 



6. GYLIAUCHEN PRUHSTORFERI (Moellendorff). PL 37, figs. 1, 

 2,3. 



Shell narrowly umbilicate, irregularly trochiform, rather 

 solid, somewhat pellucid, delicately striatulate, decussated 

 with very fine, extremely close but distinct spiral lines, opaque, 

 brown. Spire rather high, subregularly conic. Whorls 41/2, 

 very convex, separated by a deep suture, the last angular in 

 the middle, then flattened, angular again around the umbil- 

 icus, moderately ascending in front, shortly free, contracted 

 behind the aperture, then bell-shaped. Aperture slanting 

 backward, rounded-pentagonal; peristome continuous, nar- 

 rowly spreading. Two parietal lamellae, the angular nearly 

 reaching the margin, the other receding, strongly elevated; 

 columellar deep; 6 palatals, of which two are larger, long, 

 opposite to the parietal and columellar lamellae, in form of a 

 cross. Diam. 2.5, alt, 2.25 mm. (Mlldff.). 



Java (Fruhstorfer). 



Hypselostoma fruhstorferi MLLDFF., Nachrbl. d. Mai. Ges., 

 vol. 29, June, 1897, p. 70. 



It is more elevated than everetti and dohertyi, darker, more 



