OUONTOSTOMIN^E, OKTHALICIN 1 v 



Sub-family ODONTOSTOMIN^E. 



This vol., p. 24. As the anatomy of the genera of this group has 

 been discussed in the present volume, and the species described, it 

 would be superfluous to give a summary of them in this place. 



The less specialized forms of Odontostominse apparently had a 

 wider geographic range in the past than any living genus of the 

 sub-family. Hyperaulax, which is not greatly modified from Bull- 

 mulusi occurred in the Floridian Oligocene at the, time when Florida 

 was not connected with the North American continent, but had a 

 purely Antillean snail-fauna. 

 The genera are as follows: 



Genus MACRODONTES Swains., p. 29. 

 Genus ANCTUS v. Mart., p. 36. 

 Genus ODONTOSTOMUS Beck, pp. 38, 169. 

 Section Moricandia Pils. & Van., p. 40. 

 Section Bahiensis Jouss., p. 46. 

 Section Cyclodontina Beck, p. 58. 

 Section Odontostonms s. str., p. 62. 

 Subgenus SCALARINELLA 'Doer.' Dohrn, p. 66. 

 Subgenus SPIXIA Pils. & Van., p. 67. 

 Subgenus PLAGIODONTES Doer., pp. 92, 171. 

 Genus HYPERAULAX Pils., p. 102. 



Section Bonnanius Jouss., p. 103. 

 Genus TOM1GERUS Spix, p. 105. 

 Genus ANOSTOMA F. de Waldh., p. 109. 

 Section Ringicella Gray, p. 114. 



Subfamily ORTHALICIN^E. 



PILSBRY, Manual, xii, p. 99. 



Shell imperforate with solid axis, varying from ovate to oblong- 

 conic or pyramidal, the aperture ovate, toothless, columella simple 

 and straight, or twisted or truncate below. Jaw composed of a 

 small number (usually 14 to 20) of wide imbricating plaits. Teeth 

 of the radula very numerous, part or all of them bearing broad 

 gouge-shaped cusps. Cardiac side of the lung plain except near the 

 pneumostome. Genitalia simple except for an appendix on the penis. 

 Oviparous. 



A natural group of tropical American snails, chiefly arboreal, 



