258 HELIX. 



The name ARMANDIA has been proposed by Ancey (21. Nat. Sicil., 

 1888. p. 4) for H. davidi Desh. H. nora H. Ad. etc. The consideration 

 of this and other recently proposed subgenera of this group will be 

 deferred until the last volume of this series (VI) treating of the 

 Helices. 



PLECTOTROPIS, p. 51. 



Dr. von Mollendorff has instituted for a number of northern and 

 middle China shells, included principally in Plectotropis in this work, 

 the group CATHAICA. The first species enumerated, H. pyrrhozona 

 Phil., may be considered the type. The group will be further con- 

 sidered in the last volume treating of the Helices in this series. 



* 



Additional species. 



H. suBCONELiuY Mollendorff, 1888. 



Moderately umbilicate, conoid-depressed, thin, subtly urcuately 

 striate, decussated with very fine spiral lines; and with m^mbrana- 

 ceous interrupted deciduous costulse ; corneous brown ; whorls 6, 

 slightly convex, spire subregularly conoid, last whorl acutely cari- 

 nated at the periphery, base slightly inflated, obtusely angulated 

 around the umbilicus, very briefly deflexed anteriorly ; aperture 

 oblique, lunate-trapezoidal ; peristome above scarcely expanded, 

 basal margin sinuous, a little reflexed, at the columella reflexed and 

 slightly dilated. Diam. maj. 12, min. 10-j, alt. G\ mill. 



(Mollendorff.} Lien-dson, Southern China. 



H. LOFOUANA Mlldff., 1888. 



Somewhat widely umbilicate, depressed, rather solid, arcuately 

 striatulate, decussated with fine but distinct spiral lines, with mem- 

 branaceous deciduous interrupted costulse sometimes elongately 

 ciliose at the periphery ; silky, corneous yellow ; spire convex-con- 

 oid ; whorls 6-1, a little convex, the last with an exserted subcremi- 

 lated carina at the periphery, convex below, obtusely angular around 

 the umbilicus, briefly descending anteriorly; aperture oblique, axe- 

 shaped ; peristome above lightly expanded, basal and columella mar- 

 gins labiate, a little reflexed. Diam. maj. 14J, min. 13, alt. 8 mill. 

 (Mollendorff). 



Lo-fou-Shan Mts., China. 



