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PLATE 76. 



Fig. 1. 337. 1. Heteeocrinus hetehodactthts. (Pag- 279.) 



1 a, b. Two specimens of the natural size. 



1 e. The body of the same enlarged. 1 e'. Transverse section of the column, enlarged. 



1 d. An enlarged figure, representing the structure of this species. 



1 e,f. Fragments of slate with pentagonal columns of this specie*, showing the body at /'. (The letter /' is 



omitted on the plate.) 

 1 ^. A fragment of one of these columns enlarged, showing the nodulose angles. 

 1 A. A fragment of a column, with a section of the same. 

 1 t. A fragment of slate, showing numerous impressions of the plates or discs of the column. 



1 *, /, m, n, o. The same magnified, showing the pentapetaloug expansion around the canal, and the deeply 



impressed stris, which are different in each one. 



Fig. 2. 338. 2. Heteeoceinus simplex. (Pag. 280.) 



2 a. The specimen, natural size. 2 6. A few joints of the columns enlarged. 

 2 e. Section of the same, which is flattened from pressure. 



2 d. An enlarged figure, showing the structure of the body and arms of this species. 



Fig. 3. 339. 3. HETEEOCHiiros ? gracilis. (Pag. 280.) 



3 a. A specimen of the natural size. 



3 b. The same magnified. (The figure 3 6 is erroneously marked 2 ft on the plate.) 



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