30 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 125 
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1952b. Professor A. E. Verrill’s fresh-water leeches — A tribute and a critique. 
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1953. Three undescribed North American leeches (Hirudinea). Notulae 
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1958. The leeches (Hirudinea) in the collection of the Natal Museum. Ann. 
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