iMssoiiD.r-.n.i- I I:I:Y-III>.K. 



Combines the epidermis, and t< a -Teat extent the animal of Hy- 

 drohia, with the peristome of Uissoia and the operciilum of .letlVev- 

 -ia. 



Gfenufl IKAYADIA. Blanford. 1*07. 



Kis-(if<>nii, tlie apex often ohtuse. whorls spirally rihhed and 

 red with an epidcrmi.- ; aperture ovate, maririn> contimioii-. 

 anteriorly slightly effuse, miter lip with an external varix. <)p.-r 

 riilum and animal unknown. 



Brackish water. Imlin. I.K.V\TA. Hlanford. 



I'roliahly rlosely relatel to Fairltankia. 



Genu> KKNKLLA, A. Adams. 1*71. 



Shell turriculate, suhnlate, or pupoid, whorls cancellated ; aper- 

 ture oval in front, peristome interrupted, lip sharp, thickened or 

 varicose. I<\ ITIM u m:s, A. Ad. .Jujxin. 



Some authors place Feiiella in Pyramidellid.-e. 



(Jenus PTTILLA, A. Ad. l,sr,7. 



Shell fcurbinated-COnic, solid, smooth, i-imate ; aperture suhorhic- 

 ular, lij thickened, suhetfuse in front, -carcely exjtanded. Relation- 

 ships ohscure. P. LTCIDA, A. Adam>. J<i/>nii. 



(ienu^SKKNKI.LA, IMerti-r, 1<S86. 



Shell depres-ed ^loho>e, compressed around the umhilic.us : | 



Umie continuous, the inner lip straight, ohli|iie; operculum ]>auci- 

 spiral. with a projecting lamina, arising from the nueleu.-. 



S. ( ;mi:<;i ANA, Pl'etK-r. 

 Xont/i (,- 



FAMILY 



hilnhed in front, tnrmin^ i\\.. -harp, narrow, ciliated 

 appen.lai:. - Bfl l'nir a> the tentacles, which are equally ciliated : 

 ~e-.-ile al the la<e <f the tentacle-; foot lanceolate, .law- 

 -caly I'l. ."!. I'IM- 2), lladula variable, >l>ort, the central tooth 

 small, with -lightly reflected iiiarjin, lateral tooth arcuate, -one- 

 time- denticulate, -oinetime- unarmed, marginal teeth al.-eiit .r 



at , ri. 5 : 



Shell -mall, thin, t ran.-parent, v\ it h oval ap-iMure. Operculum 

 imhricated, e.,neentiic, with maririnal nucleus, the inner face with 

 a Iran-verse eanna PI. 5 1. figB. ''<'.. ' 



