Abstract
The work was carried out on the samples collected from Manora Channel, which is a narrow embayment of the Karachi coast (Hassan and Saifullah 1974, Map. I), from April 1970 to March 1971. Material and methods are the same as described earlier, and also for abreviations used in the text, reference may be made to the previous paper (Hassan and Saifullah 1974). The key to the species of the subgenus Euceratium is omitted, due to the innumerable variations at the species level (Subrahmanyan 1968, Hasle and Nordli 1951).
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