81 NOTES OF TWO DAYS' TRAWLING AND DREDGING IN THE RIVER CROUCH, OCT. 10th AND 15th, 1891. By WALTER CROUCH, F.Z.S., Vice-President. [Read March 19th, 1892.] TRAWLING and dredging, whether in the deep and open sea, off the coast, or in an estuary, is, at all times, an exhilarating and fascinating occupation; and it is one of yet greater interest when pursued in any locality from which but few records have been made, such as the eastern coast-line of our own county. There is abundance of labour, and often personal discomfort, in the work; but the marine naturalist who loves "the inexpressible sweetness of old ocean's breath," and the wondrous and beautiful world of life which exists therein, can brave all this for the pleasure of learning, and of beholding some of the secrets of the sea; for "Only those who brave its dangers Comprehend its mysteries." But apart from the hard and often dirty work, must also be counted the cost of purchasing or hiring craft, and the necessary appliances, including the "Naturalist's dredge, with its iron edge, And its mystical triangle, And its hided net, with meshes set, Odd fishes to entangle." This same question of cost has, no doubt, prevented many students of biology from taking up the study, and working at marine forms. Therefore, are our thanks especially due to our good friend, Mr. John Rogers, of "Mangapp," Burnham, for again placing his yacht "Fame," and its experienced crew, at our disposal, with the necessary apparatus, and also a well-stocked basket of creature comforts to help lighten the toil, and renew the strength. Thereby Mr. E. A. Fitch and I had again the opportunity of working in the Crouch and Roach Rivers; and he, having given us last year the results of our one-day trip (see "A Day on the Crouch," Essex Naturalist, vol. v., pp. 145-152), has left to me the honour of preparing these notes of the two-days' cruise. On the first day, we left Maldon early, and, as we passed near