1917.] NATURAL SCIENCES OF PHILADELPHIA. 107 



Explanation of Plates VII, VIII, IX, X. 



Plate VII. — Figs. 1, la, 16. — Ashmunella tetrodon fragilis n. .subsp. Type. Sta- 

 tion 58. No. 115,753. 

 Figs. 2, 2a, 26. — Ashmunella tetrodon animorum n. sub.sp. Type. Station 



26. No. 115,747. 

 Figs. 3, 3a, 36. — Ashmunella cockerelli n. .sp. Type. Station 19. No. 



115,7-48. 

 Fig. 4. — Depressed specimen of the same lot. 

 Fig. 5. — Ashmunella cockerelli argenlicola n. subsp. Type. Station 4'.. 



No. 115,749. 

 Figs. 6, 6a, 66. — Ashmunella mendax n. sp. Type. Station 16. Xo. 



115,754. 

 Figs. 7, 7a. — Ashmunella cockerelli peroblusa n. sub.-;p. Type. Station 21. 



No. 115,750. 

 Fig. 8. — Ashmunella binneyi n. sp. Type. Station SV. Xo. 115,751. 

 Fig. 9. — Ashmunella cockerelli n. sp. Enlarged view of type. 

 Fig. 10. — Ashmunella mogollonensis Pils. Enlarged view of specimen 



from the Mogollon Range. 



Plate VIII. — Figs. 1-lc. — Oreohelix melcalfei concentrica n. subsp. Type. Sta- 

 tion 7. No. 115,755. Id, dark specimen of same from Station 22. 



Figs. 2, 2a. — Oreohelix metcalfei radiata n. subsp. Station 15. 



Figs. 3-3c. — Oreohelix metcalfei radiata n. subsp. Type. Station 15. 

 No. 112,899. 



Figs. 4, 4o. — Oreohelix metcalfei acutidiscus n. subsp. Type. Station 23. 

 No. 115,757. 



Fig. 5. — Oreohelix metcalfei Ckll. Type. No. 10,941. 



Figs. 6, 6a. — Oreohelix metcalfei radiata n. subsp. Station 16. 



Figs. 7-7c. — Oreohelix pilshryi Ferriss. Type. Station 52. X'^o. 112,918a. 



Plate IX. — Figs. 1-16. — Oreohelix metcalfei cuchillensis n. subsp. Type. No. 

 115,760. 

 Fig. 2. — Oreohelix swopei n. sp. Elevated example from Station 45. 

 Figs. 3-36. — Oreohelix swopei n. sp. Type. Station 45. Xo. 112,896. 

 Figs. 4-46. — Oreohelix metcalfei hermosensis n. .subsp. Tj'pe. Xo. 115,759. 

 Figs. 5, 5a, 6, 7.— Oreohelix cooperi fW. G. B.). Station 9. No. 115,280. 

 Figs. 8, 8a. — Oreohelix cooperi (W. G. B.). Station 4L Xo. 115,156. 

 Fig. 9.— Oreohelix cooperi (W. G. B.). Station 26. Xo. 115,_306._ 

 Fig. 10. — Oreohelix metcalfei concentrica. Embryos. Xo. 115,315. 

 Fig. 11. — Oreohelix metcalfei radiata. Embryos. X'o. 115,319. 

 Fig. 12. — Oreohelix metcalfei hermosensis. Embryos. Xo. 112,922. 

 Fig. 13. — Oreohelix swopei. Embryos. Station 41. 



Plate X. — Fig. 1. — Ashmunella mendax n. sp. Station 16. 

 Fig. 2. — Ashmunella cockerelli n. sp. Station 20. 

 Fig. 3. — Ashmunella mogollonensis P. and F. 

 Fig. 4. — Ashmunella cockerelli peroblusa n. subsp. Station 21. 

 Fig. 5. — Ashnuuiella binneyi n. sp. Station 7. 

 Fig. 6. — Ashmunella tetrodon P. and F. San Mateo Mountains. Xo. 112,921. 



