NAVICELLA. 81 



N. JuNGHUHNi, Herklots. PL 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, ajjex 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 strigatious. L. 20-30 mill. 



Andaman, Is., to Java, and Philij)2)i'iies. 



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

 liptica, Blainv. (in part), X. orbicularis, Reeve (figs. 45, 46), N. 

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

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

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

 with this species A. 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. 



Philijyjjines, Viti Is. 



N. APiATA, Guillou. PL 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. 



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

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

 with pur})le brown or black, Avith 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 A^. clypeolum, Recluz (figs. 50-52), A". 

 Reclazii, and N. variabilis, Reeve (fig. 53, 54), A^ ambigua, Recluz, 

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

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