BEPTARIA. 7 



Shell ohlong-ovnte, depressed, Patella-shaped, sometimes con- 

 centrically striated, more frequently smooth, olive -yellow or 

 greenish, generally reticulated with black, no spire, vertex rather 

 obliquely intlected, sometimes beaked, lip simple, coluniellar area 

 thin, tlat, septum-like, aperture very large, muscular impressions 

 two, distinct. Operculum testaceous, nearly square, flat, with a 

 sharp tooth at the side. {Reeve.) 



13. Septaria reticulata (Reeve). 



Septarin reticulata ( Keeve), Couch. Icon., Navic. pi. 5, figs. 20 a, b, 

 k, pi. vi, tips. 2G «, b (as Navicella exiviia) ; H. & T., C. 1. 

 pi. 137, tigs. 5, 6. 



Original description: — Shell depressly ovate, thin, semitrans- 

 parent, yellowish, tinged with rose towards the apex, openly 

 reticulated with olive-black, columellar area small. 



Diam. maj. 20, diam. min. iJS mm. (from fig. 20 a in Conch. 

 Icon.). 



Diam. maj. 31, diam. min. 20"o nnn. (from fig. 26 6 in Conch. 

 Icon.). 



Hab. Ceylon. 



14. Septaria compressa {Benson). 



Septaria compressa (Bensoii), J. A. S. B. v, 1836, p. 749. 

 yiavicella lineata, var,, Sow. Thes. Conch, ii, pi, 118, tig. 25 ; II. & T., 

 C. I. pi. 137, ligs. 1, 4. 



Original description : — Testa transverse elongata, compressa, 

 lutea, albida, vel cornea, liueis munitissimis transversis diverse 

 coloratis, maculisque alternatis radiantibus decoloratis picta ; 

 dorso elevato ; limbi extremitatibus emarginatis. 



Diam. maj. 21-2."), diam. min. 11"25 mm. 



Hah. Hooghly liiver. 



Generally found adheriug to the stems of shrubs growing in 

 the water. 



15. Septaria ceerulescens (Sowerhy). 



Septaria ceeridesceus (Sowerby), Thes. Conch, ii, p. ooO, pi. 118, 

 tig. 29, & pi. 118 bis, tigs. 36, 37, 38; Reeve, Conch. Icon., 

 ]\'avic. pi. 7, tig. 29. 



Navicella orientalis, Reeve, loc. cit. fig. 33 (young). 



Navicella tessellata, ]5enson (not well of Lam.), J. A. S. B. T, 1836, 

 p. 750 ; II. .t T., C. I. pi. 137, figs. 2, 3, 7, 10. 



Original description : — Testa breviuscula, subdepressa, sub- 

 quadruta, casrulea, maculis nigris angulatis picta ; raargiue apieem 

 supei'ante ; septo angustissimo, arcuato. 



Diam. maj. IT'S, diam. min. 12o mm. (from fig. 29 in Ihes. 

 Conch.). 



JJab. liixer Ganges, Bengal. 



