NAVICELLA. 81 



N. JUNGHUHNI, Herklots. PI. 28, figs. 42, 43. 



Sub-rotund, smooth, shining, convex, dark olivaceous brown, the 

 apex often purplish, with undulating transverse black lines, rest of 

 surface without markings ; septum a little produced in the middle. 

 L. 30-35 mill. 



Java. 

 Section ELARA, H. and A. Adams, 1854. 



N. SUBORBICULARIS, Sowb. PL 29, fig. 44. 



Rounded oval, rather elevated, apex elevated and recurved, inter- 

 marginal, a little oblique, epidermis yellowish green, varying to oli- 

 vaceous brown, the lighter colored specimens sometimes purple 

 tinted above, with triangular radiating markings or irregular ra- 

 diating blackish strigations. L. 20-30 mill. 



Andaman, Is., to Java, and Philippines. 



The synonyms are ? N. porcellana, Linn., N. picta^ Schum, N. el- 

 liptic^ Blainv. (in part), N. orbicula'ris, Reeve (figs. 45, 46), N. 

 sqintmata, Dohrn, N. Javanica, Mouss., N. Forstenii, Herklots, N. 

 Urvillei, Recluz, and its vars. Gaimardi and Quoyi, Recluz, and 

 N. puleherrima, Tapparone-Canefri. I am also compelled to unite 

 with this species N. variabilis, Recluz, (figs. 47, 48) ; typically it is 

 somewhat higher and more elliptical in outline, but shades away in 

 both respects : N. Schmeltziana, Mousson, is a synonym of it. 



Philippines, Viti Is. 



N. APIATA, Guillou. PI. 29, fig. 49. 



Obovate, apex high, blunt, olivaceous yellow, variegated with 

 black, so as often to form large tear-like radiating blotches of the 

 lighter color. L. 25-32 mill. 



Marquesas to Viti Is. 



N. TESSELLATA, Lam. PL 29, fig. 57. 



Subelliptical or oblong, rather depressed, spire narrow, recurved, 

 not terminal, thin, not much shining, olivaceous yellow, tessellated 

 with purple brown or black, with obscure rays, varying to olivaceous 

 or purplish brown, with a few short radiating lines and minute spots 

 of white. L. 18-30 mill. 



Ceylon, Java to Philippines. 



The synonymy includes N. clypeolum, Recluz (figs. 50-52), N. 

 Reclttzii, and N. variabilis, Reeve (fig. 53, 54), N. ambigua, Recluz, 

 N. atra, Reeve, N. radiata, Reeve, var. subrostrata, Martens, and its 



