APPENDIX. 299 







H. mersispira MART., Monatsb. d. Berl. Akacl. 1864, p. 525; Os- 

 tas. Zool., Landschn. p. 303, t. 14, f. 8. PFR. Monogr. v, p. 388. 



Only dead, bleached specimens were obtained. The slightly 

 sunken spire, narrow lip, without a basal tooth, and uniform white 

 coloration are its more notable features. 



H. QUADRIVOLVIS Martens. PI. 45, figs. 41, 42, 43. 



Shell with a funnel-shaped umbilicus, inflated discoidal, subtly 

 striate, white, with one brown band. Spire a trifle immersed ; suture 

 profound ; whorls 4, cylindrical, the last scarcely descending in 

 front, not constricted. Aperture subvertical, sinuous, obliquely 

 lunate ; peristome thin, shortly expanded in every part, margins 

 distant, columellar margin obliquely descending, basal subrectilin- 

 ear, ascending forward, the upper inflexed. Alt. 7, greater diam. 

 15, lesser 12 mill. (Mart.) 



Western Borneo near Mandhor ; at Kepahiang and Rinduhati, 

 Middle Sumatra. 



H. quadrivolvis MART., Monatsber. Berl. Akad. Wissensch. 1865, 

 p. 53 ; Ostas. p. 288, t. 14, f. 6. PFR., Mon. v, p. 392. 



Above, near the suture, and beneath around the umbilicus there 

 are slight indications of carination, too indistinct to be mentioned 

 in the description. There is no constriction behind the lip. The 

 straight basal lip reminds one of Planorbis trivolvis Say. 



APPENDIX. 



STEGODERA. 



STEGODERA HENSANIENSIS Gredler. Unfigured. (See page 13.) 



Allied to H. trisinuata Mart. ; widely umbilicated, scarcely cari- 

 nated, subdepressed ; spire a little convex, closely striated, finely 

 granulated to the apex, but without the rows of tubercles of H. 

 trisinuata; chestnut-rufous, streaked transversely below the suture 

 with whitish; whorls 4|-5, separated by profound sutures, the last 

 whorl not swollen around the umbilicus, free in front and deflexed. 

 Aperture ob-triangular, trisinuate, pale flesh-brown inside; peris- 

 tome continuous, thickened, whitish, reflexed, three-toothed ; one 

 tooth on the parietal callus, one (somewhat bifid) on the basal 

 margin, one on the outer margin, the two latter marked by broad 

 furrows behind the peristome. Alt. 10, diam. 20-21 mill. (Gredler.) 



H&nsan, Province of Hunan, China 



