J * Linnean Society. ' 501 



cate magnetic electrometer. He explains these n^ative results, by sup- 

 posing that the motion of the electricity in the torpedinal organ is in 

 no measureable time, and wants that continuity ofmirrent requisite for 

 the production of magnetic effect. '^^ 



~% 



.^ 



;^ Linnean Society. ';s . ' 



J^ 3, 1828.-^A. paper was read. On a new genus of \^odeii^a: by 

 Joshua Brookes, Esq., F. R. & L. S. -iij^ 



The type of the genus here proposed, to ^ich the name of La- 

 gostomus is assigned by the authour, is the animal described by M. 

 Blainville and by M. F. Cuvier, as the Dipiis rnaximus. Their oppor- 

 tunitieSvOf observation having been confined to tne^ving animal, minute 

 examination of whi^h was prevented |by its fierceness, were Insufficient 

 to determine with dj^tainty the group to which it ought to be "^Sreferred. 

 On the death of this^^ndividual its remains passed into the possession of 

 Mr. Brookes,: who obtained from it a stuffed skin aj^d a sj|B§ton. The 

 existence in the latter of three metatarsal bones showed that it could not 

 be regarded as a Dipus, and this circums||gce, and the pecuhar structure 

 ■ oAhe crowns of the molar teeth have induced^fche aiithour to consider it as 

 constituting a new genus. He enters fully into an osteological descrip- 

 tion of its skeleton, which. he compares and contrasts in many particulars 

 with that of Dip^s Sagitwb; and i^^ some respects with those of other 

 rodent quadrupeds^: and furnishes, in conclusion, the distingmshing ge- 

 neric characters. 



June 17. — The reading of Mr. Brookes' s paper-was colicluded. 



A paper was read, entitled Description of a species of Tringa, killed 

 in Cambridgeshire, new to the British Islands and to Europe : by Wil- 

 liam Yarrell, Esq., F.L.S. A ' 

 "'^ The authour describes a singulsKy marked Tringa which was shot in 

 Cambridgeshire in the month of September, 1826. This bird is rendered 

 more than usually interesting, from the circumstance, that it is not only 

 new tor this country, but is acknowledged by the best Ornithologists to be 

 ^ Slso entirely new to Europe. . It is described by M. Vieillot, under the 

 name of Tringa' rnfescens, as having been 'found in Louisiana, and a 



