344 



3Iegalograptus Welchi. 



color, appear more brilliant than they do in the specimen, and the 

 same may be said of the cells on figures 36 and 37. This, however, 

 was unavoidable, and is probably not very objectionable. 



The connection of the parts shown by figures 36 and 37, with the 

 cylindrical part of the body, has not been observed, but, from the 

 numerous fragments of all parts, found crowded together in the blue 



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 ■ - 3 3 3 3 ■*, 



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Via 3? 3 3 'j? A 





Fig. 36. — Megalograplus Welchi. Frond showing the spinous processes. 



marl, and the appearance of the large end of the best preserved fronds, 

 and the broken appearance of the ends of the cylindrical part of the 

 body, the conclusion seems almost inevitable, that they form part of 

 the same animal. 



Figure 36 represents a frond from the collection of Dr. L. B. Welch. 

 It was evidently somewhat conical in shape, though now flattened ; 

 the spinous processes were, too, like thorns, though now flattened. 

 The frond seems to have been separated into sections, though the 



Fig. 31.— Megalograplus Welchi. Frond showing the spinous processes. 



section marks, which consist of mere depressions in appearance, ai'e not 

 shown in the figure. The first section mark crosses just below the first 

 four spines, the next one from just above the four spines to the first 

 saw-tooth -like projection, the next one from above the next cluster of 



