ANOSTOMA. Ill 



Aperture subhorizontal, rounded, obstructed by eight folds; the peri- 

 stome white, very broadly expanded, reflexed and recurved, rather thick, 

 arcuate throughout, the parietal callus translucent-white, broadly 

 spreading upon the last and preceding whorls. Parietal margin 

 bearing three lamellae : a small, triangular angle-lamella, a large, 

 erect parietal lamella, the inner end of which curves behind the pre- 

 ceding tooth, and a smaller, straight infraparietal lamella near the 

 middle of the parietal margin. Outer lip bearing five folds: subequal, 

 straight and rather large upper and lower palatal folds within the 

 outer margin, a somewhat smaller columellar lamella below them, 

 and two still smaller suprapalatal folds on the upper margin, the 

 upper one smaller and tuberculiform. 



Alt. 21, greater diam. 45, lesser 33 mm. 



Alt. 20, greater diam. 39, lesser 29 mm. 



Eastern Brazil : Prov. Parahyba (Mousson) ; Ceara (Morelet). 



Anostoma octodentata F. DE WALDH., Museum Demidoff, iii, p. 230, 

 231 (1807) Helix ringens Linnei, CHEMNITZ, Conchyl. Cab. ix, pt. 

 1, p. 86, pi. 109, f. 919, 920 (1786) ; WOOD, Index Testae., pi. 33, 

 f. 26 a (bad). Tomogeres ringens MONTFORT, Conch. Syst. ii, p. 

 359, pi. 90 (bad). PFR., Symbolae, ii, p. 109. Tomogerus depressus 

 BLAINVILLE, Man. de .Malac., p. 459, pi. 39, f. 4, 4a (bad). Ano- 

 stoma ringens SOWERBY, Genera, Anostoma, f. 1 ; reproduced in 

 REEVE, Conchol. Systemat. ii, pi. 169, f. 1 KUSTER, Conchyl. 

 Cab., Helix, pi. 12, f. 5, 6 (reproduced from Chemnitz), and pi. 12*, 

 f. 4-6. PFR., Monogr. i, p. 1 ; iii, 284. ADAMS, Gen. Rec. Moll., 

 p. 198, pi. 77, f. 8. DESHAYES, Trait 6 Elm., pi. 83, f. 1, 2. 

 MOUSSON, Malak. Bl. xvi, 1869, p. 172. 



Anastoma (or Anostoma} depressum SOWERBY, Conchol. Manual, 

 p. 5, f. 271, 272 ; edit. 2, p. 65 Angystoma resupinata SCHUM ACKER, 

 Essai d'un Nouv. Syst. Vers Test., p. 229 (1817). 



Not Helix ringens Linn. Not A. depressa Lam. 



This is the largest species of the genus, distinguished from the next 

 chiefly by its more depressed form and the absence of a " basal fold'* 

 at the junction of the lower and outer margins of the lip. The 

 broader white lip, more numerous teeth and generally larger size 

 separate it from A. depressum Lam. 



A. DESHAYESIANUM Fischer. PI. 6, figs. 46, 47. 



Shell orbiculate-globose, lightly striate, hardly shining, covered 



