﻿NO. 14 LANDSHELLS COLLECTED IN PERU IN I9II — DALL 5 



2. Mutation A. Shell creamy white with faint, axial, gray or pale 



brownish streaks, and traces of obsolete spirals as grayish 

 bands. 



Ollantaytambo, at 10,000 feet elevation. U. S. N. Mus., 

 No. 250247. 



3. Mutation B. Pale buff with darker axial streaks, apex rosy ; 



no spirals except the conspicuous umbilical band. 



Three leagues above Santa Ana, opposite Chinche, 3500 

 feet elevation. U. S. N. Mus., No. 250248. 



4. Mutation C. Buff with broken spirals except subsutural and 



umbilical bands ; apex corneous. 



Same locality as B. U. S. N. Mus., No. 250249. 



5. Mutation D. Buff with sharply defined subsutural and umbili- 



cal spirals, the other spirals absent or barely traceable. 

 Same locality as B. U. S. N. Mus., No. 250250. 



6. Mutation E. Larger, darker, subsutural band wide and strong, 



the others mostly broken, the axial streaks dark brown. 

 Same locality as B. U. S. N. Mus., No. 250251. 



7. Mutation F. Axial streaks dark and strong. All spirals absent 



or obsolete. 



Above Ollantaytambo, 10,000 feet elevation. U. S. N. Mus., 

 No. 250252. 



8. Mutation G. Spirals chocolate brown, more or less fused; axials 



strong ; with an effect of a peripheral whitish band. 



Between Ollantaytambo and Maras, 10,000 to 11,000 feet 

 elevation. U. S. N. Mus., No. 250254. 



9. Mutation H. Larger, antesutural band much broken, subsutural 



strong, others mostly broken, but strong. 



Same location as B. U. S. N. Mus., No. 250253. 



10. Mutation I. Smaller, spirals dark and close set wiith " strung 



triangles " effect over axial streaks. 



Same location as B. U. S. N. Mus., No. 250255. 



11. Mutation /. Very dark, all spirals strong and close set, more or 



less nebulous, apex rosy. 



Same location as B. U. S. N. Mus., No. 250257. 



The D. humboldti of Reeve, while belonging to the same general 

 group, seems to be a very distinct form, represented in the U. S. N. 

 Mus. by specimens from Urubamba, Peru (No. 1 10065). 



