PTEROC YCLOS. 



Plate. 



All)ersi, Pfeiffur II. 



anguliferus (Ci/clostoma), Souleyet . . II. 



auomalus. Reeve V. 



Batcliiaiiensis, Pfeiffer II. 



Bernardii, Pfeiffer V. 



biciliatus (Opisihoporits), Pfeiffer. . . . IV. 



bifrons, Pfeiffer I. 



bilabiatus, Benson III. 



birostris {Opist/ioporus), Pfeiffer ... IV. 



Blaiuli, Benson II. 



brevis {Litiius), Martyn I. 



cetra, Benson III. 



Cingalensis, Benson III. 



Cochincliinensis {OpistJioporus), Pfeiffer IV. 



Curaingii, Pfeiffer III. 



euryomplialus {Opislhoporus), Pfeiffer V. 



Hainesii {Rhiostoma), Pfeiffer IV. 



Species. 



9 

 10 

 27 



6 

 23 

 17 



18 

 7 

 4 

 11 

 14 

 23 

 14 

 29 

 19 



Plate. 



Hanglitoni {Rhiosloma), Benson. ... V. 



hispidus (Spiraculum), Pearson .... V. 



Iloiisei, Haines IV. 



nanus, Benson III. 



parilis, Pfeiffer 1. 



parvus (Spiraculum), Pearson III. 



pictus, Troschel II. 



planorbulus {Cyclostontd), Lamarck . . I. 



Princepsi, Pfeiffer V. 



Pterocycloides {Opistkoporns), Pfeiffer V. 



pullatus, Benson Ill 



rostellatus {Opistkoporns), Pfeiffer. . V. 



rupestris, Benson II. 



simplicilabris, Pfeiffer IV. 



tenuilabiatus {Cyclostoma), Metcalfe I. 



tubuliferus (Opist/ioporus), Pfeiffer . . V. 



tener, Menke V. 



S[>riies. 



.■50 

 2f) 

 21 

 12 

 ■I 



ITi 



S 



:{ 



2(1 

 27 

 I (i 

 2.5 



s 

 20 



.5 

 24 

 2y 



