PLANAXID;E-IRAUI>ID^. 239 



culigerous lobe with four filaments, tentacles obtuse at their ex- 

 tremities, the right one much longer. 

 A. PICTA, A. Ad. About 25 species. 



Japan, Australia, Mazatlan, West Indies. 



Subgenus DIAL A, A. Adams, 1862. 



Shell spirally striate, not varicose, sometimes a little nodulous 

 around the middle, columella nearly straight, not truncate, lip 

 simple. 5 sp. 



Philippines, Australia, Japan. 



D. VARIA, A. Ad. 



(Subgenus STYLIFERINA, A. Ad., 1860.) 



This group I have included in Eulimidre (Manual, viii, 286) ; 

 but Mr. Adams, in 18H2, regarded it as a member of the Litiopida?, 

 in which opinion he has been followed by Watson and others. I 

 introduce the group again, in order to include some new species by 

 Watson, which may possibly really belong in Litiopidse. 



? FAMILY GIRAUDID^. 



Characters those of the following genus. 



Genus GIRAUDIA, Bourg., 1885. 



Shell oval, spire conoid, transparent, polished, without epidermis, 

 last whorl extending upwards at the aperture half way upon the 

 penultimate ; aperture oval, superiorly angular, with a trace of a 

 sinus, columella short, robust, enlarging below, peristome strongly 

 thickened ; imperforate. Operculuni unknown. G. PR.ECLARA, 

 Bourg. Fresh water. Lake Tanganyika, Africa. 



As neither animal nor operculuni are known, the only characters 

 are those of the shell which is unfigured. Bourguignat is unable 

 to assimilate the group with any previously-known family. 



Genus REYMONDIA, Bourg., 1885. 



Shell oval-conoidal, more or less elongated, reddish chestnut 

 color with a lighter sutural band, smooth, polished, without epider- 

 mis ; last whorl slightly ascending at the aperture, then shortly de- 

 flected at the insertion of the strongly-thickened patulous lip, 

 which is without external rib, columella with a longitudinal-curved 

 ridge ; no umbilicus. Operculum unknown. R. HOREI, Smith. 



Lake Tanganyika. 



