CONTENTS. 



PAPT I.— Septembek, 1875. 



I. On the Morphology of the Skull in the Woodpeckers (Picidse) and Wrynecks (Yungidse). 



By Prof. W. K. Parker, F.B.S. (Communicated by II. T. STainton, Esq., Sec. 

 Linn. Soc.) (Plates I.-V.) page 1 



II. On some Atlantic Crustacea from the ' Challenger ' Expedition. By Dr. P. v. 



"Willemoes-Stjhm, Naturalist to the Expedition. (Communicated by Professor 

 "Wyvele Thomson, F.B.S. , F.B.S.) (Plates VI.-XIII.) 23 



III. On the Structure and Systematic Bosition of Stephanoscyphus mirabilis, the Type of 



a new Order o/Hydrozoa. By Professor Allman, M.D., BB.D., F.B.S., 8fc, 

 Pres. Linn. Soc. (Plate XIV.) . 61 



PART II.— December, 1875. 



IV. On the external Anatomy of Tanais vittatus, occurring with Limnoria and Chelura 



terebrans in excavated Bier-wood. By John Denis Macdonald, M.I)., F.B.S., 

 Staff-Surgeon B.N., Assistant Brofessor of Naval Hygiene, Netley Medical School. 

 (Communicated by W. T. Thiselton Dyer, M.A., F.L.S.) (Plate XV.) . . 67 



V. On Valencinia Armandi, a new Nemertean. By W. C. M'Intosh, MB., F.B.S. E., 



F.L.S. (Plate XVI.) 73 



