Annelides, 



17 



serving it, I found this to be a callow nestling, and from the agonies 

 of the poor sparrow there was no mistaking the parent ; the feathers 

 of the latter were all erect, and it continued hopping and fluttering 

 about, and uttering the most distressing cries for the loss of one of 

 its y.oung, which I suppose had fallen out of the nest. — James Bla- 

 don; Pont-y-pool, September 4th, 1841. 



On the Minute Anatomy of the Horse Leech, Hcemopis sanguis orha, 

 (Sav.), Hirudo vorax, (Johnston). By John Quekett, Esq., 

 M.R.C.S.L. 



a. Ventral surface of the horse-leech, b. Stratum of muscular fibres running transversely ; these 

 are situated immediately underneath the cutis, c Strata of muscular fibres running obliquely, d. Stratum 

 of muscular fibres, running in a longitudinal direction, e. Jaw of the horse-leech, showing the fifteen teeth. 

 /. Detached teeth of the horse-leech. g. One of the jaws of the medicinal leech, showing the teeth. 

 h. Part of the jaws of the medicinal leech exhibiting the teeth as seen from above. i. Detached teeth of 

 the medicinal leech. k. The upper part of the oesophagus of the horse-leech, laid open to show the lon- 



gitudinal rugse and the three cartilaginous jaws in situ. I. Alimentary canal of horse-leech. m. Ali- 

 mentary canal of the medicinal leech. 



The subject of the present paper is referred by Cuvier to that fa- 

 mily of Annelides termed Abranchious, and is characterised by having 



