SEPT A HI A. 7 



Shell oblong-ovate, depressed, Patella-shaped, sometimes con- 

 centrically striated, more frequently smooth, olive -yellow or 

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

 obliquei} r inflected, sometimes beaked, lip simple, columellar area 

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

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

 sharp tooth at the side. (Reeve.) 



13. Septaria reticulata (Reeve). 



Septaria reticulata (Reeve), Conch. Icon., Navic. pi. 5, figs. 20 , 6, 

 & pi. vi, figs. 26 , 6 (as Navicella eximia) ; H. & T., C. I. 

 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. inaj. 20, diam. min. 13 mm. (from fig. 20 a in Conch. 

 Icon.). 



Diam. maj. 31, diam. min. 20'5 mm. (from fig. 26 & in Conch. 

 Icon.). 



Hcib. Ceylon. 



14. Septaria compressa (Benson), 



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

 Navicella lineata, var., Sow. Thes. Conch, ii, pi. 118, fig. 25 ; H. & T., 

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



Original description : Testa transverse elongata, compressa, 

 lutea, albida, vel cornea, lineis munitissimis trausversis diverse 

 coloratis, maculisque alternatis radiantibus decoloratis picta; 

 dorso elevato ; limbi extremitatibus emarginatis. 



Diam. maj. 21-25, diam. min. 11'25 mm. 



Eab. Hooghly River. 



Generally found adhering to the stems of shrubs growing in 

 the water. 



15. Septaria casrulescens (Sowerby). 



Septaria ccendescens (Sowerby), Thes. Conch, ii, p. 550, pi. 118, 

 fig-. 29, & pi. 118 bis, figs. 36, 37, 38; Reeve, Conch. Icon., 

 Navic. pi. 7, fig. 29. 



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



Navicella tessellata, Benson (not well of Lam.), J. A. S. B. v, 1836, 

 p. 750 ; H. & T., C. I. pi. 137, figs. 2, 3, 7, 10. 



Original description : Testa breviuscula, subdepressa, sub- 

 quadrata, ca3rulea, maculis nigris angulatis picta ; raargine apicem 

 superante ; septo angustissimo, arcuato. 



Diam. maj. 17'5, diam. min. 12'5 mm. (from fig. 29 in Thes. 

 Conch.). 



Hob. River Ganges, Bengal. 



