VOL. XL.] PHILOSOPHICAL TRANSACTIONS. l63 



As long as this insect lived, it continually, and with singular facility, moved 

 its feet, drawing at the same time into its sheath and putting out again, the 

 extreme part of its body. 



The same sort of Insect found in Kent. By the Rev. Mr. Littleton Brown, 

 F.R.S. fVith a Remark, by the Secretary, Dr. Mortimer. N''447, p. 153. 



Mr. Brown presented a creature, whose name he could not learn from any 

 books or persons. He brought it from a pond on Bexby Common, where great 

 numbers had been observed for 5 weeks before. The pond was quite dry the 

 24th of June, but on its being filled with the great thunder-shower on the 25th, 

 within two days the pond was observed to swarm with them. And it was 

 thought observable, that there is no duct or channel that could convey them 

 from any adjacent place. 



Here E, fig. 6, pi. 6, represents this insect. Its legs are very extraordinary. 

 Dr. Mortimer counted 42 on a side, in one of those found in Kent ; the 20 

 next the head are nearly of a size, but then they grow gradually smaller and 

 smaller towards the tail. He took out one of the larger ones of the left side 

 of the chest ; the foot consists of 5 flat membranous claws, with a stiffs rib 

 along their middle, and beset with hairs on the edges, like those of crabs ; on 

 the lower side of the leg hangs an oval bag, and beyond that grows a large thin 

 membrane, which can be extended by a bony rib that runs across it ; this mem- 

 brane and the whole foot, is convex on the side next the head, and concave on 

 that next the tail ; the thigh, or first joint of the leg, is webbed on each side ; 

 so that the whole structure of the legs seems to show that they are rather de- 

 signed for swimming with, than walking. The leg represented at e, was drawn, 

 when the insect lay on its back, as at b. Many parts of this insect, though no 

 larger than the figures, have some resemblance to those of the Molucca crab. 



/in Account and Abrtract of the Meteorological Diaries for the Years 1729 and 

 1730. By Geo. Hadley, Esq. F.R.S. N" 447, p. 154. 



The diary kept by Mr. Hauksbee, by order of the Society, at their house in 

 Crane-Court, consists of observations of the barometrical heights twice a day, 

 i. e. morning and evening, in inches, decimals and centesimals ; the thermo- 

 meter likewise, in its proper graduations, and the weather, with the hour of each 

 observation. The winds are omitted. The depth of rain is set down several 

 times for the most part in each month, the sum of which is to be divided by 

 10, the funnel which catches the rain being so much larger in surface, than that 

 of the vessel which receives the rain from it. 



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