SUCCIXEID^E. 445 



Stenogyra (Spiraxis (Euspiraxis)) cingalensis, Pfeiffer & Clessin, 



Nomencl. Helic. Viv. 1881, p. 323. 

 Digoniaxis cingalensis, Jouseeaume, Menu Soc. Zool. France, vii, 



1894, p. 29l; Pilsbry, Man. Conch, ser. 2, xviii, 1906, pi. 4, 



fig. 18; xix, 1908, p. 289. 



Original description : " S. testa subrimata, subulato-turrita, 

 gracili, solida, polita, striatula striis minutis confertissimis undu- 

 latis spiralibus decussata ; spira elongata, superne sensiin attenuata, 



apice ? ; sutura vix impressa, irregular! ; anfractibus super- 



stitibus 11 (apicalibus deficientibus), planulatis, ultimo ad basin 

 rotundato ; apertura subobliqua, emarginato-elliptica ; peristomate 

 recto, intus ad angulum superiorem calloso ; margine dextro 

 superne arcuato, basali incrassato, columellari calloso, expan- 

 siusculo, subreflexo, superne plica obliqua spirali solida munito. 



"Long. 14, diam. 3 mill., ap. long. 3, diam. 1J mill." (Benson.) 



Hab. Ceylon : Weelgamoowe, Matelle (Layard). 



" A Syrnola-like shell, differing from Tortaxis by the spiral 

 plait on the upper part of the columella. Its solidity causes me to 

 place it in Digoniaxis with some doubt, especially since it belongs 

 to a different 'fauna." (Pilsbry.) 



Family SUCCINEIDJE. 



Genus SUCCINEA, Draparnaud. 



Succinea, Draparnaud, Tabl. Moll. Terr. fluv. France, 1801, p. 55 ; 

 C. Pfeiffer, Syst. Anordn. Beschr. Land- und Wasserschn. 1821, 

 p. 66 ; Gray in Turton, Manual, 1840, p. 177 ; Pfeiffer, Mon. 

 Helic. Viv. i, 1848, p. xiv ; Adams, Gen. Kec. Moll, ii, 1855, p. 128 ; 

 Lehmann, Leb. Schn. Musch. Umg 1 . Stettins, 1873, p. 49 (anatomy); 

 Ihering, Jahrb. Deuts. Malak. Ges. iv, 1877, p. 138 (anatomy) ; 

 Fischer, Man. Conchyl. 1883, p. 490, fig. 261 (radula). 



Type: (first species) Helix putris, Linne ( = Succinea oblong 'a, 

 Draparnaud). 



Range. All parts of the globe. 



Shell imperforate, oval, thin, horny, more or less translucent ; 

 spire conical, short, whorls rapidly enlarging, the aperture large, 

 oblong, columella simple, peristome simple, acute. 



Animal with a large foot; tentacles short, the upper pair 

 conoid, swollen at the base, the lower pair scarcely visible, some- 

 times absent. 



" The hermaphrodite gland, both as regards structure and 

 position, does not exhibit any special features ; the same applies 

 to the thick, sausage-shaped hermaphrodite duct which is very 

 prominent on account of its dark coloration, derived from the 

 superimposed pigmented cells of the connective tissue. Both 

 before and after pairing time I found it crowded with sperma- 

 tozoa. The epithelium is not vibratory. Where it approaches 



