PLANAXID.E-CiIRAlDID.1<:. 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, Axistralia, Mazatlan, West Indies. 



Subgenus Diala, 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 Eulimidse (Manual, viii, 286) ; 

 but I\Ir. Adams, in 1862, regarded it as a member of the Litiopidse, 

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

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

 Watson, which may possibly really belong in Litiopidse. 



? Family GIRAUDIDM 



Characters those of the following genus. 



Genus GIRAUDIA, Bourg., 1885. 



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

 last whorl extending upwards at the aj^erture half way upon the 

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

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

 thickened ; imperforate. Operculum unknoAvn. G. PRiECLARA, 

 Bourg. Fresh water. Lake Tanganyika, Africa. 



As neither animal nor operculum 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. 



