. Aberystwyth Studies. / by Members of the University College of SEA-FLOOR FAUNA OF CARDIGAN BAY 233 .-aiiimals, what migrations certain of the fauna may undergo, and will, it is hoped, throw light upon the time and habits of breeding, the rate of growth, and other matters of interest concerning many of the forms present. DESCRIPTION OF APPARATUS The first necessity is a boat of sufficient size to allow of the manipulation of the gear. The Draig-y-mor is a motor-boat which we have secured by the financial aid of the Ministry of Agriculture and Fisheries, and the generosity of the Honbl
. Aberystwyth Studies. / by Members of the University College of SEA-FLOOR FAUNA OF CARDIGAN BAY 233 .-aiiimals, what migrations certain of the fauna may undergo, and will, it is hoped, throw light upon the time and habits of breeding, the rate of growth, and other matters of interest concerning many of the forms present. DESCRIPTION OF APPARATUS The first necessity is a boat of sufficient size to allow of the manipulation of the gear. The Draig-y-mor is a motor-boat which we have secured by the financial aid of the Ministry of Agriculture and Fisheries, and the generosity of the Honble. Samuel Vestey. The boat is thirty-seven feet in length and has an engine of 18- 20 horse - power. Without a boat of this order it would not be possible to carry out the re- search discussed in this paper. The heaviest piece of apparatus to manipulate is the Petersen grab, but the boat is quite equal to its man- Fig. 2.—Petersen Grab OR Bottom Sampler. agement. The Petersen Grab or Bottom Sampler (Fig. 2) is, as already remarked, an apparatus devised by C. G. Joh. Petersen, of Denmark. It is built on the plan of the great grabs which are used for removing earth, etc., in canal construction. It consists of two main pieces held together by movable clamps on their upper surfaces. These two pieces when closed together fit tightly against one another to form a kind of box. The apparatus is let down into the sea open, being held open by means of a cross- piece, which fits into a hook arrangement and is kept in position by the tightness of the rope by which the apparatus is Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original University College of Wales (Aberystwyth, Wales). Aberystwyth : University College of Wales
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