The paper embodies the results of the re-examination and taxonomic studies carried out on certain specimens of Pontellopsis ( Copepoda : Calanoida) of the 'Wilson Collection' deposited in the U. S. National Museum. The erratic determination of the identity of certain species viz., Pontellopsis brevis (Giesbrecht), P. laminata Wilson, P. lubbocki (Giesbrecht), P. perspicax (Dana), P. sinuata Wilson, and P. strenua (Dana) have been noted and discussed. The male of P. laminata Wilson, hitherto undescribed has been reported. It is apparent that the discrepancies noted were largely due to the confusion in cataloguing the material.