746 PROCEEDIXGS OF THE ACADEMY OF [Oct., 



ENDODONTIDJE. 

 Functum taiwanicum n. sp. 



Shell umbilicate, very minute, with low-conoid spire and tubular 

 whorls; brownish-corneous, very finely, densely striate. Whorls 4, 

 convex. Aperture rounded lunate, the peristome simple and thin, 

 its insertions widely separated. 



Alt, O.S, diam. 1.35 mm.; width of umbihcus 0.4, of aperture 0.56 

 mm. 



Hotawa, Taiwan. Types No. 90,220 A. X. S. Phila., from No. 1.414 

 of Mr. Hirase's collection. 



Very closely related to P. atomus, but slightly larger with less sharp 

 striation, four whorls, and an umbilicus nearly as wide as the aperture. 

 P. atomus has 3§ whorls (not 3 as stated in the original description), 

 and the ajDerture is much larger than the umbilicus. 



PHILOMYOID^. 

 Philomycus formosensis (Ckll.). 



Limacella formosensis Ckll, Ann. and Mag. Xat. Hist. (6), VI, p. 384. ISOS- 

 ? Philonnjcus hilineatus Heynemann, Jahrb. d. m. Ges., 1885, p. 300. 

 Cf. CoUinge, Journ. of Malac, VII, p. 82. 



Formosa. This slug is not known to me b}* specimens. It requires 

 comparison with the species of China, the Ryukyu Islands and Japan. 



AURICULID^. 

 Carychium pessimum Pils. 



Proc. A. X. S. Phila., 1901, p. 562. 



Hotawa (Hirase). Originally described from Tanega-shima in the 

 N.E. Ryukyu group. 



Fresh- WATER Mollusks. 



LYMN^ID^. 

 Lymnaea swinhoei H. Ad. 



P. Z. S., 1866, p. 319, pi. 33, fig. 13. 

 Takao (Swinhoe). An allied form with shorter last whorl was taken 

 at Toshen (Hirase, 1901). 

 Planorbis compressus japonicus Marts. (?). 



Toshen (Hirase, 1901). A form not quite so compressed and a little 

 less angular than that named by von Martens, yet nearer to that than 

 to any other named form known to us. 



Segmentina swinhoei H. Ad. 

 L. c, pi. 33, fig. 14. 

 Tungkang, 15 miles below Takao, and also at Takao in ponds and 

 rice-fields (Swinhoe). 



