Hendrik Engel

1898

• Astéries et ophiures
• Echinoderms from Aruba, Curaçao, Bonaire and northern Venezuela
• Hendrik Engelʼs Alphabetical list of Dutch zoological cabinets and menageries
• Holothuries ..
• Ueber westindische Aplysiidae und verwandten anderer gebiete
• Westindische opisthobranchiate Mollusken