220 PLANORBIS. 



11 — 13. Pl. Arcticus, Beck. Moller Moll. 

 Groenl. 5. 



Am. Jour. Conch, iv, 32, t. 4, f. 9, 



1868. No. 27. 



14 — 16. Pl. circumstriatus, Tryon. Am. 

 Jour. Conch, ii, 113, t. 10, f. 68, 

 1866. No. 28. 



SEGMENTINA. 



17 — 19. S. Wheatleyi, Lea. Philad. Proc. 

 41, 1858. 

 Observ. xi, 114, t. 23, f. 71. No. 2. 



CARINIFEX. 



20 — 24. C. Newberryi, Lea. Philad. Proc. 

 41, 1858. 

 Megasystropha Newberryi^ Lea. Observ. 

 xi, t. 23, f. 68. No. 1. 



(67) 



