Vlll 



Page 



Carter, J. Thornton. 



On the Occurrence of Denticles on the Snout of Xiphias 

 gladius. (Plates I.-IIL) 321 



CooKE, Rev. A. H., Sc.D., F.Z.S. 



The Radula of the Mitridaa. (Text-figures 1-18.) 405 



CoPEMAN, Lt.-Ool. S. MoNCKTON, M.D,, F.R.S., F.Z.S. 



Experiments on Sex Determination 433 



Cunningham, J. T., M.A., F.Z.S. 



Development of 5^«rsms 495 



Duncan, F. Martin, F.R.M.S., F.Z.S. 



Exhibition of, and remarks upon, a series of photo- 

 graphs showing the actinic quality of the light from a 

 living Pyrophorus Beetle 498 



Gemmill, James F., M.A., M.D., D.Sc. 



The Development of the Mesenteries in the Actinian 

 Urticina crassicornis. (Text-figures 1-5.) 453 



The Ciliation of the Leptomedusan Melicertidium 

 octocostatum (Sars). (Text-figure 6.) 459 



Hamilton, Major J. Stevenson, C.M.Z.S. 



Field-Notes on some Mammals in the Bahr-el-Gebel, 

 Southern Sudan. (With Chart.) 341 



Heron-Allen, E., F.R.S., F.Z.S. 



Exhibition and description of a series of Skiagraphs of 

 the Foraminiferan genus Verneuilina 499 



Hill, Prof. J. P., F.R.S. 



The Affinities of Tarsius from the Embryological 

 Aspect. (Table, Plate I., and Text-figures 1-5.) 476 



