no 



ON TWO NEW AND THREE HITHERTO UNFIGURED 

 SPECIES OF PLECTOPYLIS FROM TONKIN. 



I!v G. K. r.UDE, F.Z.S. 



The shells which form the subject of these notes were collected by 

 Mr. P'ruhstorfer. Three new species were established on them by Dr. 

 von Mollendorff in the Nachrichtsblatt der Deutschen INIalakozoo- 

 logischen Gesellschaft in 1901. A fourth species described at the 

 same time, proved to be identical with one collected by Col. Messager 

 and placed in my hands for examination. This species Plertojii/Iis 

 emigram, Mlldff, I have recently figured.' Dr. von Mollendorff obli- 

 gingly lent me the types of his four species for comparison and illus- 

 tration. Together with these was a form which he thought would 

 prove to be P. iMijaria^ Mab., but I have since received from Mr. 

 Fruhstorfer a series of the true P. plthjaria, and upon comparison it 

 is clear that Dr. von Muhendorff's siiells pertain to a different and 

 hitherto undescribed species. 



Pleetopylis pilsbryana, n. sp. 



P. viUedanji, Pilsbry and Gude {mm Ancey) : Pilsbry, Manual of 

 Conch., 1893, viii, p. 157, pi. 43, figs. 36— 39.~Gude, 

 Science Gossip, 1897, N.S. iv, p. 139, figs. 60a, 60b. 

 Journ. of Malac, 1901, viii, p. 48, figs. 3a, 3b. Journ. 

 de Conchy]., 1901, xlix, p. 212. 

 i/a/A^Lang-Son, Bac-Ninh (\'athelet). Isles in Along llay (Mess- 

 ager). Tonkin (Fruhstorfer). 



The shell which I have hitherto considered to be P. villeilanji 

 (following Mr. Pilsbry's identification), has now been examined by 

 Mr. Ancey who informs me it is not his species but a new form. It 

 thus requires to be renamed, and I have [pleasure in dedicating it to 

 Mr. Pilsbry, who has done so much to place systematic malacology 

 on a scientific basis. 



I. Journ. de Conchyl., 1901, vol. .\lix, pi. 6, figs. 5a — 5c. 



