Studies on gammaridean Amphipoda (Crustacea) from India

Three gammaridean amphipods are described in this paper and one of them, Pontogeneia barnardi, is new to science. Sufficient distinctions have been recognised in Perioculodes megapleon (Giles) for reviving this species and keeping it separate from Perioculodes longimanus (Bate & Westwood). A discussion on the relationship of some genera very closely related to Perioculodes Sars is also included. A brief description of Quadrivisio bengalensis Stebbing is given, pointing out some noteworthy variations from the original description.