168 



Lattrei, Reeve. 90. 



Layardi, id. 91. 



Linnei, Pkilippi. 92. 



livescens, Reeve. 93. 



lubrica, id. 94. 



luteostoma, Stvainson. 95. 



Luzonica, Reeve. 96. 



Lymnsepeibrmis, id. 97. 



mcesta, id. 98. 



Malabarica, Pliilippi. 99. 



malleata, Jonas. 100. 



raaura, Reeve. 101. 



megastoma, Sowerby. 102. 



melanocheila, Reeve. 103. 



Metcalfei, id. 104. 



miltocheilus, id. 105. 



nobilis, id. 106. 



notabilis, id. 107. 



nubila, id. 108. 



nux, id. 109. 



oblonga, Swainson. 110. 



olea, Reeve. 111. 



olivacea, Spix. 112. 



Oronocensis, Ziegler. 113. 



ovata, Olivier. 114. 

 Palndinoides, Christof. 115. 



papyracea, Spix. 116. 



patula, Reeve. 117. 



Pernambucensis, id. 118. 



Physoides, id. 119. 



picta, id. 120. 



pilula, Reeve. 

 planorbula, Pliilippi. 

 Platse (Helix), Maton. 

 polita, Ues/tayes. 

 porphyrostoma, Reeve. 

 producta, id. 

 prunulum, id. 

 puncticulata, Swains. 

 reflexa, id. 

 Koissyi, D'Orbigny. 

 rufilineata, Reeve. 

 saxea, id. 



scalaris, D'Orbigny. 

 simplex, Reeve. 

 sordida, Swainson. 

 speciosa, Pliilippi. 

 Spixii, VOrbigny. 

 Spmcei, Reeve. 

 Swainsoni, Pliilippi. 

 teres, id. 



testudinea, Reeve. 

 trochulus, id. 

 Turbinoides, id. 

 urceus (Nerita), Miill. 

 venetus, Reeve. 

 vermiformis, id. 

 vexillum, id. 

 vittata, id. 

 vitrea (Helix), Born. 

 Yatesii, Reeve. 

 zonata, Spix. 



Figure. 



Ampullar! a Oiionocensis. PL 17. Fig. 90. Shell, showing its globose 

 form, and sombre, olive, horny covering, tinged with blood-red about 

 the aperture. 



Genus 2. PALUDINA, Lamarck. 



Animal ; with a large mantle and oblong triangular disk, having 

 a horny operculum, sometimes spiral, sometimes concentric, on 

 a rounded posterior lobe. Head produced into a lengthened 



