35. Altocumulus With a Partially Altostratus Character, M7. 



This is a layer of altocumulus with a rippled or corrugated under 

 surface. Formerly this cloud was called "wrinkled altostratus" but 

 the International definitions now place a cloud sheet of this character, 

 with definite relief on the under surface, in the class of altocumulus 

 opacus. The layer shown here should be coded M^. (Photo at Fort 

 Worth, Tex., by E. H. Karrer.) 



36. Altocumulus Associated With Altostratus, M^, 



In this picture there is a layer of altostratus associated with con- 

 siderable amounts of altocumulus at a lower level. A sky of this 

 type is commonly observed in the central reoion of a weak disturbance. 

 The photograph was taken shortly after the passage of a cold front. 

 (Photo at Portland, Oreg., by V. T. Horn.) 



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