6 Echin. 
V. Echinoderma. 
[1911] 
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Clark, A. H. The axial canals of 
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Clark, A. H. Remarks on the 
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Clark, A. H. A new crinoid genus 
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Clark, A. H. Note sur les Crinoi'des 
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Clark, A. H. Thalassocrinus, a new 
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Clark, A. H. On the inorganic con- 
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Clark, A. II. Tho rocont crinoids 
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Clark, A. H. The systematic position 
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[07, 5; 31, F. J 49 
Clark, Hubert Lyman. The develop- 
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Clark, II. L. North Pacific Ophiurans 
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Clarke, John M. and Luther, D. Dana. 
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Clerc vide Sartory. 
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