APODID.^. 19 



to move its feet with constant and singular facility, witli- 

 di'awing the extreme part of the body, as it were into a 

 sheath, and again protruding it. I could find amongst 

 authors no trace of any insect of this sort." (p. 152.) 



About the same time a number of specimen^ of the same 

 animal were found in Kent by theRev. Mr. Littleton Brown, 

 F.R.S., who, in August 1736, sent a specimen, with a letter 

 to Dr. Mortimer, then secretary to the Royal Society, and 

 which is published, along with Klein's letter to Sir Hans 

 Sloane, in the 'Philosophical Transactions' for 1738, 

 No. 447. " I brought it,'' he says, " from a pond upon 

 Bexby (Bexley?) Common, where great numbers liave 

 been observed for these live weeks past. The pond was 

 quite dry, the 24th of June, but upon its being filled with 

 the great thunder-shower, upon the 25th, within two days 

 the pond was observed to swarm with them, by a farmer 

 watering his cows there." (p. 153.) 



Linnaeus, in his 'Fauna Suecica,' published in 1746, 

 mentions that he had seen a specimen dried of this animal, 

 in London, as early as the year 1728, at the house of a 

 naturalist, who told him that it had been taken in Prussia. 



The chief early historiographer, however, of the genus 

 is SchoefFer, who in his monograph 'Der Krebsartige 

 Kiefenfuss,' published at Ratisbon in 1756, gives a very 

 long and full account of almost all that was then known 

 concerning it, with well-executed figures of two species, 

 numerous anatomical details, and the progressive deve- 

 lopment of the animal, from the egg to maturity. His 

 description is very carefully drawn up, and Latreille, in 

 his ' History of the Phyllopoda,' has translated the greater 

 part of it into Prench, and thus rendered it more ac- 

 cessible to naturalists in this country. 



Voschge, in a paper in the ' Naturforschcr' for 1783, has 

 given a good many details, and a short but excellent de- 

 scription of the anatomy of the mouth is given by Savigny, 

 in his ' Memoires sur les Animaux sans Vertebres,' 1816. 



Bosc, Latreille, Desmarest, and Milne Edwards have 

 repeated SchoefFer's descriptions and observations in their 



