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- Instructor in General Zoology and Comparative Anatomy of Vertebrates at the College of Liberal Arts,
University of the Philippines, Manila, 1923-1937.
- Instructor in Biology, General Zoology and Anatomy of Vertebrates at the Ateneo de Manila, 1926-1937.
- Lecturer in General Zoology, Aquatic Zoology and General Fisheries at the Philippine Institute of
Fisheries Technology (now College of Fisheries, University of the Philippines), Manila, 1952-1957
- Professorial Lecturer in General Zoology and Economic Entomology at the Araneta Institute of Agriculture
(now Araneta University), Malabon, Rizal, 1956.
- Professorial Lecturer in Marine Biological Sciences, Invertebrate Paeontology, Heredity, Plant Microtechnique,
at the Graduate School, University of Sto. Tomas, Manila, 1954-1970.
- Advisers to graduate students working for their M.S. Degree in Zoology, Biological Sciences and Marine Botany,
Graduate School, University of Sto. Tomas, Manila, 1954-1970.
- Taxonomic researches on marine invertebrates at the Puerto Galera Marine Biological Station, University of the
Philippines, Mindoro, 1924-1937.
- Taxonomic Researches on marine biology at the Tenth Fishery District, Zamboanga City, 1937-1952.
- Researches on the determination of fishes caught by explosive and poisonous substances at the Tenth Fishery
District , Zamboanga City, 1937-1952.
- Taxonomic Researches on marine invertebrates (Holothurioidea) at the Allan Hancock Foundation, University
of California, Los Angeles, California, 1949-1950.
- Marine Biology studies on the development and breeding habits of marine turtles at the Turtle Islands, Sulu, 1951.
- Marine biological studies at the Lucap Marine Biological Station, Alaminos, Pangasinan, 1953.
- Brackish-water studies on the Dagat-dagatan Salt-water Experimental Station, Malabon, Rizal, 1952-1958.
- Biological studies on the marine fauna and flora of Manila Bay, 1957-1958.
- Taxonomic studies and check list of Philippine Littoral Echinodermata with Grant-in-Aid from the Philippine
National Research Council of the Philippines, 1965-1968.
- The Graduate School through the proposal of Dean Rev. Fr. Alfredo Panizo, O.P. under the initiative of the
writer three years ago submitted to the N.S.D.B. a project for financial assistance entitled "THE COMMERCIALIZATION OF
AND INDUSTRIALIZATION OF EUCHEUMA AND OTHER ALLIED GENERA" for the processing of their Colloids and further exploration
on their utilities. Lately the said project was referred by the new Administration to the N.I.S.T. for comment and
recommendation. A similar project with a wider scope was submitted by the same agency, hence the original project was
withdrawn.

Curriculum Vitae
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