THAI' MA> PUS, 



xxi 



a. Sliell distinctly perforate or umbilioate. 



b. Large, solid species, \vitli spiral scries of granules ; three 



earlier whorls densely wave-striate ; peristome expanded, 



subreflexed. Group of T. melanocheilns. 



b l . Smaller, more slender forms, with coarser, very irregular or 



dislocated wrinkles on the early whorls; peristome but 



slightly or not expanded. Group of T. bilseniatus. 



a 1 . Shell imperforate. 



b. Early whorls finely and densely wave-striate longitudinally. 



Group of T. taunaisii. 

 b 1 . Early whorls thimble-pit ted v Group of T. thompsoni. 



Group of T. melanocheilns. 



T. melanocheilus Nyst, x, 44. T. granocinctus Pils., xiv, 126. 

 T. sangoae Tschudi, x, 45. B.Jilocinctus Rolle. 



B. pangose Morel., x, 198. T. foveolatus Rve., x, 40. 



B. impressus Tschudi. 



Group of T. taunaisii. 



T. magnificus Grat., x. 46. 



v. monozonalis Dh., x, 47. 

 T. tatutor Jouss., x, 47. 

 T. taunaisii Fer., x, 48. 



? Helix pullata Fer. 

 T. ascendens Pf'r., x, 49. 

 T. plumbeus Pfr., x, 49. 

 T. hector Pfr., x, 50. 

 T. largillierti Pfr., x, 50. 



B. consimilis Rve. 



T. achilles Pfr., x, 51. 



v. nehringi Mart., x, 51. 

 T. hartwegi Pfr., x, 52, 198. 



Zebra loxensis Miller. 

 T. loxostomus Pfr., x, 52. 

 T. salteri Sowb., x, 52. 

 T. thompsoni Pfr., x, 53, 198. 

 T. yanamensis Morel., x, 54, 198. 

 T. viriatus Morel., x, 54. 

 T. requieni Pfr., x, 55. 



Group of T. bitaniatus. 



T. spixii Wagn., x, 55. 



? B. hyalinus Spix. 



? Bulinus sordidus King. 

 T. inca Orb., x, 56. 

 T. tseniolus Nyst., x, 57. 

 T. brephoides Orb., x, 57, 198. 

 T. iserni Phil., x, 57, 198. 

 T. tarmensis Phil., x, 60. 

 T. bitaeniatus Nyst, x, 58 ; xiv, 

 127. 



B. bivittat.us Phil. 



B. bifasciatus Phil. 



B. fusiformis Tsch n d i . 



form unicolor Phil., x, 59. 



v. alutaceus Rve.. x, 59, 198. 



v. jelskii Lub., x, 58. 

 T. porphyreus Pfr., x, 60, 198. 

 T. jaspideus Morel., x, 61. 



