TROCHOMORPHA. 



Trochomorpha as a somewhat aberrant genus of Zonitidce ; and as 

 such it can properly claim no place in this volume. It is a signifi- 

 cant fact, that, so far as I know, all Zonitidce which possess a bifid 

 cusp upon the marginal teeth, jorm it by the elevation of the ectocone 

 upon the mesocone, while in those Helicidce having a long bifid inner 

 cusp on the marginals it is formed by the union of the entocone with 

 the mesocone. One of the earliest modifications of the Zonitid stock 

 was the loss of entocones from the marginal teeth ; but in the 

 Ilelicoids they persist in most genera. 



Species of India, China, Farther India and adjacent islands. 



T. benigna Pfr. iii, 84. 



T. borealis Mlldff. viii, 119, 133. 



T. cantoriana Bens, iii, 83. 



T. caryx Bens, iii, 75. 



T. castra Bens, iii, 84. 



v. galerus Bens, iii, 75. 

 T. fritzei Bttg. viii, 194. 

 T. haenseli Sch. & Bttg. viii, 119. 

 T. paviei Mori, iii, 82. 



Species of Andaman and Nicobar Is. 



T. billeana Morch, iii, 84. T. sanis Bens., iii, 84. 



T. iopharynx Morch. T. subnigritella Bedd. viii, 127. 



T. kjellerupi Morch. iii, 74. T. sulcipes Morch. iii, 84. 



Philippine Island species. 



T. percompressa Bens, iii, 84. 

 T. saigouensis Crse. iii, 84. 

 T. sapeca Heude. 

 T. shermani Pfr. iii, 84. 

 T. subtricolor Mab. viii, 134. 

 T. timorensis Mts. iii, 83. 

 thieroti Morg. viii, 133. 

 T. tonkinorum Mab. viii, 120. 



T. acutimargo Pfr. iii, 85. 

 T. albocincta Pfr. iii, 86. 

 T. bagoensis Hid. viii, 134. 

 T. beckiana Pfr. iii, 86. 



v. kierulfii Morch. iii, 86. 

 T. bintuanensis Hid. viii, 134. 

 T. boettgeri Mlldff. viii, 134. 

 T. conomphala Pfr. iii, 84. 

 T. costellifera Moll, viii, 125, 

 T. crossei Hid viii, 134. 

 T. curvilabrum Rve. iii, 86. 

 T. gouldi Pfr. iii, 77. 

 T. granulosa viii, 125. 



T. luteobrunnea Moll, viii, 120. 



splendens Hid. non Semp. 

 T. metcalfei Pfr. viii, 121. 



solaroides Rv. iii, 85. 

 T. neglecta Pils. viii, 124. 

 T. quadrasi Hid. viii, 122. 



stenogyra Mlldff. 

 T. radiila Pfr. iii, 85. 

 T. repanda Moll, viii, 123. 

 T. rufa Mlldff. viii, 133. 

 T. sibuyanica Hid. viii. 

 T. splendens Semp. viii, 123. 

 T. splendidula Moll, viii, 123. 



