CONTENTS. 



ARTICLE PAGR 



I. — On the Structure of the Ligament connecting the Valves of Conchiferous 



Mollusks. By E. J. Quekett, Esq., F.L.S. - - - 1 



II. — On some Phenomena connected with the Movement of the Cilia in the 

 Common Mussel {Mytilus edulis). By John Quekett, Esq., As- 

 sistant Conservator of the Museum of the Royal College of Surgeons 

 of England _-_.-_. 7 



III. — Some Observations on the Natural History of the Echinococcus. By 



Geoege Busk, Esq., F.M.S., &c. - - - - - 10 



IV. — On Animals of the Chalk still found in a living state in the Stomachs of 



Oysters. By the Rev. J. B. Reade - - - 20 



V. — On certain Peculiarities in the Structure of the Feathers of the Owl tribe. 

 By John Quekett, Esq., Assistant Conservator of the Museum of 

 the Boyal College of Surgeons of England - - - -25 



VI. — Remarks relating to the Examination of Guano by the Microscope. By 



Edwin J. Quekett, Esq., F.L.S. - - - - - 29 



VII. — On some Abnormal Forms of Fungi, with remarks on their Morphology. 



By Edwin Lankester, M.D., F.L.S., B.S.E., &c. - - - 33 



VIII. — On the Structure of the Flabella of some of the higher forms of Crus- 

 tacea, with some Remarks on their probable Use in the Function of 

 Respiration. By John Quekett, Esq., Assistant Conservator of the 

 Museum of the Royal College of Surgeons of England - - 37 



IX. — On a method of mounting Objects in Canada Balsam. By Thomas 



Boys, Esq. Communicated by J. S. Bowerbank, Esq. - - 44 



X. — On the Intimate Structure of Bone, as composing the Skeleton in the four 

 great classes of Animals, viz., Mammals, Birds, Reptiles and Fishes, 

 with some Remarks on the great Value of the Knowledge of such 

 Structure in determining the Affinities of Minute Fragments of Or- 

 ganic Remains. By John Quekett, Esq., Assistant Conservator of 

 the Museum of the Royal College of Surgeons of England - 4tf 



XI. — Additional Observations on the Intimate Structure of Bone. By John 

 Quekett, Esq., Assistant Conservator of the Museum of the Royal 

 College of Surgeons of England - - - - 59 



XII. — Observations on the Structure and Nature of the Filaria medinensis, or 



Guinea Worm. By George Busk, Esq., F.L.S., &c. - - 65 



XII.* — On the Occurrence of Fossil Xanthidia and Polythalamia in Chalk. 



By Henry Deane, Esq. - - - - - - 77 



