194 BOYSIDIA. 



Subgenus BOYSIDIA s. str. 



Boysidia ANCEY, Le Naturaliste, i, March, 1881, p. 373, for 

 P. dorsata and P. plicidens. GUDE, Fauna of British. India, 

 Moll., ii, 1914, p. 293, type P. dorsata. Gredleriella MLLDFF., 

 Jahrb. D. M. Ges., 1884, p. 179, for P. hunanensis only. 



The angular and parietal lamellae are concrescent, forming 

 one bilobed lamella (except in B. strophostoma, where they 

 are only weakly connected) ; the inner end of the columettar 

 lamella turns down. 



Two Chinese species, B. gracilis Mlldff. and B. euconus 

 Mlldff., are mentioned by Dr. von Mollendorif in his Binnen- 

 Mollusken aus Westchina und Centralasien, ii, 1902, p. 85. I 

 have not seen descriptions. 



1. BOYSIDIA HUNANA (Gredler). PL 33, figs. 8, 9. 



Shell openly umbilicate, turrite-conic, irregularly and 

 weakly striatulate, silky, reddish brown. Whorls 6 to 6%, a 

 little convex, the last produced in a tube in front, somewhat 

 ascending. Aperture ample, oblong, 5-plicate: three short, 

 immersed plicas in the palate, the lower one punctiform; one 

 lamelliform, obliquely descending around the columella, and 

 one high but thin, flexuous parietal lamella. Peristome ex- 

 panded, fragile. Alt. 1%, breadth 114 lines [about 3y 3 x2% 

 mm.] (Gredler). 



China: Yiin-tcheu-fu, Prov. Hunan (K. Fuchs, type loc.) ; 

 throughout the Yangtse valley, common on limestone rocks 

 (Heude). 



Pupa hunana GREDLER, Jahrb. d. Deutschen Malak. Ges,, 

 viii, 1881, p. 23, pi. 1, f. 5. HEUDE, Notes sur les mollusques 

 terrestres de la vallee du Fleuve Bleu, p. 76, pi. 18, f. 25. 

 Pupa (Gredleriella) hunanensis GredL, MLLDFF., Jahrb. D. 

 M. Ges., xi, 1884, p. 179. Pupa (Boysidia) hunanensis var. 

 conspicua MLLDFF., Jahrb., xii, 1885, p. 396. 



Typical hunana has the last whorl built forward, "trom- 

 petenformig erweitert, lostretend und ein wenig ansteigend," 

 according to Gredler 's description and figure. So far as I 

 know, this form is local ; at least it is not what is commonly 

 known as hunana in collections. 



