64 ODONTOSTOMUS. 



for identification. Helix ( Cochlodina) gargantua FERUSSAC, Prodr., 

 Tabl. Syst., p. 62, no. 510 (insufficient desc.). Helix (Cochlodina) 

 pantayruelina MORICAND, Mem. de la Soc. de Phys. et d'Hist. Nat. 

 de Geneve, vi, p. 542, pi. 1, f. 7 (1833); vii, p. 440, with (p. 441) 

 var. major dentata, major edentala and minor (the latter = 0. leuco- 

 trema), viii, p. 142, pi. 3, f. 5 (living animal) Bidimus pentagrue- 

 linus DESK, in Lam., An. s. Vert., viii, p. 255 (1838); in Fer., 

 Hist. p. 119, pi. 162, f. 14. B. panto gruelinus Reeve, Conch. Icon., 

 pi. 38, f. 230. PFR., Monogr. ii, p. 83; iii, 367; iv, 435; vi, 75; 

 Conchyl. Cab. p. 144, pi. 45, f. 3, 4 HIDALGO, Journ. de Conchy!., 

 1870, n. 51 (reports it from Rio Janeiro, Paz). DOHRN, Jahrb. 

 1883, p. 349. Clausilia pantagruellina VILLA, Dispositio System- 



alica Conch, p. 25 Odontostomus panta gruelinus BECK, Index, p. 



54 (1837). H. & A. ADAMS, Gen. Rec. Moll. p. 152. 



Exceedingly variable in the form and number of teeth, as Mori- 

 cand pointed out ; even toothless adult shells occurring occasionally. 

 The aperture is sometimes placed somewhat askew (fig. 82). 



O. LETJCOTREMA Beck. PL 8, figs. 77/78. 



Shell rimate-perforate, fusiform, light brown variegated by the 

 white wrinkles, which are low, frequently anastomosing, and cut by 

 microscopic spiral striae ; the suture bordered by a row of low white 

 nodules; a purple-black streak behind the lips. Whorls 8. Aper- 

 ture oblong ear-shaped, black-bordered within, obstructed by four or 

 five white teeth : a small entering parietal lamella, a squarish colu- 

 mellar lamella, and within the outer lip a compressed lower palatal, 

 and squarish obliquely-transverse upper palatal fold, sometimes a 

 small fold between them. Peristome snow-white, broadly reflexed 

 and recurved. 



Length 49, diam. 17-19, length of aperture 24-25 mill. 



Length 45 mill. (Moric.). 



Brazil : Prov. Bahia (Blanchet). 



Pupa ringens JAY, Catalogue of Rec. Shells, edit. 2, p. [81], pi. 1, 

 f. 1 (1836). Not P. ringens Michaud, 1831. Helix pantagruelina 

 var. minor MORIC., Mem. Geneve vii, p. 441 (1836). Odontostomus 

 leucotrema BECK, Index Moll. p. 54 (based upon the preceding). 

 Bulimus panta gruelinus var. ft PFR. Monogr. ii, p. 83 DESH. in Fer. 

 Hist. pi. 162, f. 5, 6. B. leucotrema PER., Zeitschr. f. Malak. 1850, p. 

 109 ; Conchyl. Cat., Bui. p. 145, pi. 45, f. 11-13 ; Monogr. iii, p. 367. 



