1. '78- Nogle Bidrag til de athecate Hydroiders Histologi. Videnskabelige Meddelelser fra den naturhistoriske Forening in Kjϕbenhavn, 1877-78, 29 pp., 1 Taf.
2. '58- Further Report on the Vitality of the Spongiadæ. Rep. 27 Meet. Brit. Assoc. Adv. Sci., pp. 121-125, pl. 1.
3. XIV.—Notes on the freshwater Infusoria of the Island of Bombay. No. 1. Organization
4. '80- Die Ctenophoren des Golfes von Neapel. Fauna und Flora des Golfes von Neapel, Monogr. 1, xviii + 313 pp., 18 Taf.