ANCYLUS. 237 



ANCYLUS. 



7, 8. A. BOREALis, Morse. Portland Jour, i, 

 45, 1864. 

 Binney, 1. c. 156. No. 10. 



9, 10. A. Newberryi, Lea. Proc. Acad. 

 Philad. 166, 1858. 

 Observ. xi, 141, t. 24, f. 116. 

 Binney, 1. c. 145. ' No. II. 



11, 12. A. KooTANiENSiS, Baird. Proc. Lond. 

 Zool. Soc. 69, 1863. 

 Binney, L c. 144. No. 12. 



13, 14. A. ALTUS, Tryon. Am. Jour. Conch, 

 i, 230, t. 22, f. 15, 1865. No. 14. 



15, 16. A. SUBROTUNDATUS, Tryon. Am. 

 Jour. Conch, i, 230, t. 22, f. 14. 

 1865. No. 15, 



17, 18. A. FRAGiLis, Tryon. Proc. Philad. 

 Acad. 149, t. 1, f. 15, 1863. 

 Binney, 1. c. 146. No. 16. 



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