ORTHALICUS. 189 



white); columella thin, arcuate, white (in a variety nearly straight and 

 whitish above only); parietal wall with a brownish callus, usually 

 white within (but in the variety with a broad blackish-chestnut cal 

 lus throughout), wanting in young shells. 



Alt. 84, diam. 54, longest axis of aperture 56 mill, (var.) 



Alt. 53, diam. 39, longest axis of aperture 38 mill. 



Alt. 70, diam. 50 mill. 



La Poule Sultane, FAVANNE, Cat. Syst. p. 13, pi. 1, f. 47 

 Helix gallina sultana CHEMNITZ, Conchyl. Cab. xi, p. 281, pi. 210, f. 

 2070, 2071 (1795).* BuUmus gallinasultana LAM., An. s. Vert, vi, p. 



117 (1822) WAGNER, in Spix, Testae. Bras. p. 9 ORBIGNY, 



Voy. dans l'Ame>. Merid. p. 265 REEVE, Conch. Syst. ii, pi. 173, 

 f. 7 ; Conch. Icon. pi. 32, f. 198. KUSTER, Conchyl. Cab. p. 8, pi. 

 8, f. 1, 2. TROSCHEL, Archiv fur Naturg. 1849, i, p. 228, pi. 4, f. 

 2 (dentition) ; Reisen in Britisch-Guiana (Schomburgh), iii, p. 547. 

 HUPE in Castelnau, Exped., p. 38 (1857). DROUET, Moll. Terr. 



et Fluv. Guyane Francaise, p. 66 (1859) PFR., Monogr. ii, p. 145 ; 



iii, 381 .Succinea gallina- sultana PFR., Symbolre ad Hist. Hel., ii, 



p. 131 (1841) Orthalicus gallinasultana SHUTTLEWORTH, Notitiae 



Malac. i, p. 59 (1856.) PFR.,. Monogr. iv, p. 587; vi, p. 198, viii, 

 p. 261. BINNEY, Ann. Lye. Nat. Hist, of N. Y. xi. (1874), p. 38, 

 pi. 4, f. A-F(anatomy) ; Ann. N. Y. Acad. Sci. iii (1884), p. 128, 

 pi. xv, f. N (jaw), pi. xii., f. C (dentition) STREBEL, Beitr. Mex. 

 Land- und Siisswasser-Conch. v. p. 2, pi. xi, f, 10 (genitalia). 

 MARTENS, Conchol. Mittheil., p. 158. Sultana gallina sultana 

 MILLER, Malak. Blatt. xxv, p. 186. COUSIN, Bull. Soc. Zool. de 

 Y ranee, xii, 1887, p. 196. 



Helix sultana, DILLYVYN, Descriptive Catal., ii, p. 920 (1817). 

 FEU., Prodr., p. 52; Histoire, pi. 117, f. 2. WOOD, Index Testa- 

 ceologicus, pi. 33, f. 75. ORBIGNY, Mag. de Zool. 1835, p. 8 

 Achatina sultana SWAINS., Exotic Conchology, p. 26, pi. 10 (1841). 

 Orthalicus sultan BECK, Index Moll., p. 59 (1837). Achatina 

 pavonina SPIX, Testae. Bras., pi. 9, f. 1 (1827) Bulimus princeps 

 POTIEZ & MICHAUD, Galerie des Moll., i, p. 151, pi. 14, f. 29. 

 Orthalicus gallina sultana and 0. pavoninus H. & A. AD., Gen. Rec. 

 Moll., ii, p. 154. 



The Guianas: All over British Guiana, on tree trunks (Schom- 

 burgk); around Cayenne, French Guiana (Eyries). N.-E. Brazil: 

 on the Rio Tocantins, in the region of Baiao, 5 meters above the sea 



