Natural Productions of l^exden and its Neighbburhood, 1 7 



is an oval bag filled, in the specimens examined, with innu- 

 merable minute granules. When the animalcule was com- 

 pressed between plates of glass, these granules escaped 

 abundantly from the mouth, and from a prominent aperture 

 a little below it on the side. The walls of the branchial sac 

 are marked with several lines or plaits in a longitudinal 

 direction ; but I saw no traces of any vascular network. On 

 the inner side of the branchial sac there is an obscure ap- 

 pearance of an intestine or vessel winding up it to end at the 

 anal aperture {c) ; and near the base of the sac there is a con- 

 siderable orange-coloured spot marked with longitudinal lines, 

 and presumed to be the stomach {d). Immediately below 

 this, the body is suddenly contracted into a very long and 

 linear tail, as it may be called, in which, when compressed, 

 we perceive a dark intestine-like mark, mottled with darker 

 and lighter shades on each side, and a clear space between 

 them ; but I cannot trace any distinct termination of these 

 organs (which are the ovaries) in the branchial sac, although 

 the shadings at the base of this part indicate the existence and 

 situation of some distinct organs. This species has a great 

 resemblance to Aplidium effusum of Savigny, but I cannot 

 consider them identical. Hob, Berwick Bay, in deep water. 

 Berxmck upon Tweed, Sept, 1833. 



Art. V. Remarks on the Natural Produelions of Lexden and 



its Neighbourhood* By J. G. (^TtfRct/*^*^-^ <^y%>^^ ) 



Our village stands on a gentle slope, at the foot of which 

 runs the river Colne, winding its course through a picturesque 

 valley, fertilising many rich and verdant meadows, and turning 

 in its passage a considerable number of mills. Our soil is 

 generally a light gravel, and so very dry, that our usual paths 

 are passable even in the depth of winter, and we are thereby 

 afforded facilities for the enjoyment of sylvan scenery which 

 but few neighbourhoods possess. 



Just below the village, on the north-west side, is a con- 

 siderable extent of spongy boggy soil, full of springs of un- 

 common purity and strength, which, in the short space of a 

 quarter of a mile, form a crystal stream sufficient to drive a 

 corn mill, lately erected on the spot. This stream, which 

 affords a supply of 400 gallons a minute, is not at all affected 

 by the seasons, being equally strong in the driest and the most 

 rainy weather. 



Our parish is particularly well wooded, producing many 

 lofty oaks, elms, and alders ; and, consequently, we have mast 



Vol. VII. — No. .37. c 



