﻿PLATSrORBIS— Plate III. 



Species 22. (Fig. a, h, Mas. Sowerby.) 



Planorbis oebicolatus. Pla. testa depressd, alba, 

 semipellucidd ; atifradibus quinis, superne con- 

 vexo-planulatis, latiusculis, infra angustatis ; apcr- 

 turd oblique elevatd, margine inferiori suninii 

 accUvi. 



The OEEicnLAE Planorbis. Shell depressed, white, 

 semipellucid ; whorls five, convexly flattened 

 ' above, rather broad, narrow below ; aperture 

 obliquely raised, lower margin sloped upwards. 



MoRELET ? Adams. 



Hal. ? 



Species 23. (Fig. a, b, Mus. Sowerby.) 

 Planorbis Philippinarum. Pla. testa depressd, griscd, 

 subopacd; avfractibtis semis, subcompressis, supra 

 infraque convexiilscidis, medio obtusissime arigu- 

 latis ; disco inferiori planulato ; disco superiori 

 magis cotKavo ; aperturd superni paulu elevatd. 

 The Philippine Planorbis. Shell depressed, grey, 

 rather opaque ; whorls six, rather compressed, 

 rather convex above and below, very obtusely 



angular in the middle ; lower disc flattened. 



upper disc more concave ; aperture a little raised 



above. 

 Dunker. C. B. Adams. P. Z. 1848. 

 Ilah. Philippines. 



This shell is stouter and deeper than the prece- 

 ding, and the discs are less flattened. 



Species 24. (Mus. Sowerby.) 



Planorbis lugubeis. Pla. testd altimadd, teniii, he- 

 vigatd, nitenti, castaned; anfradibus qidnis, su- 

 pierne rotundis, latiitsculis, infra magis eontrac- 

 tis ; disco superiori profunda excavato, disco infe- 

 riori suhviridi, subeontracto. 



The darksome Planorbis. Shell rather deep, thin, 

 smooth, shining, chestnut ; whorls five, rather 

 rounded above, rather broad, more contracted 

 below ; upper disc deeply excavated ; lower disc 

 greenish, rather contracted. 



Wagner. Spix, Testacea Braziliana. P. 27. No. 2. 



Hah. Brazil. 



