Vlll 



Page 



48. The Marginal Processes of Lamellibranch Shells. By 



Cyril Crossland, F.Z.S. (Plate LX. and Text-figs. 



229 & 230.) 1057 



49. Warning Coloration in a Nudibranch Mollusc and in a 



Chameleon. By Cyril Crossland, F.Z.S 1062 



50. Chromodorids from the Red Sea, collected and figured 



by Mr. Cyril Crossland. By Sir Charles Eliot, 

 K.C.M.G., C.B., F.Z.S. (Plate LXI.) 1068 



51. On some jSTew South African Permian Reptiles. By 



R. Broom, D.Sc, C.M.Z.S. (Plates LXIl. & LXIII.) . 1073 



52. On a New Tree-Frog from Trinidad, living in the 



Society's Gardens. By Edward G. Boulenger, 

 Curator of Reptiles. (Plate LXI V.) 1082 



53. A Contribution to the Ornithology of Western Colombia. 



By C. E. Hellmayr, Division of Birds, Zoological 

 Museum, Munich 1084 



ADDENDUM. 



Additional reference to Dr. P. Chalmers Mitchell's 

 memoir, " On Longevity and Relative Viability in 

 Mammals and Birds " 868 



New Generie Terms xviii 



Index of Scientific Names xix 



Index of Illustrations xxxviii 



