but very rare in the ijdible Frog, and this was the first occasion 

 on which such a sj)ecimen had been exhibited in the Gardens. 

 Blue Edible Frogs have been previously reported from France, 

 Western Germany, and Switzej-land. 



Mr. BouLENGER also exhibited a living specimen of the re- 

 markable Lizard Pygopus lepidopus, a species which is rarely seen 

 alive in this country, and which ha,d not been represented in the 

 Society's Collection for some considerable time, 



Dr. F. E. Bedi?ard, M,A., F.R.S., F.Z.S., Prosector to the 

 Society, read a paper, the eighth of the series, on the Anatomy 

 and Systematic Arrangement of the Cestoidea, in which he dealt 

 with a number of new species of Ichihyotcenia and Ophidotcenia 

 obtained from the gut of Serpents tliat had died in the Gardens. 



Mr, H, G. Plimmeb, F.R.S., F.Z.S,, Pathologist to the Society., 

 presented his annual report on the deaths which occurred in the 

 Society's Gardens during the past year, together with a list of 

 the Blood Parasites found dui'ing the same period. An examina- 

 tion had been made of the blood of every animal that had died, 

 with the result that parasites had been discovered in 140 cases, 

 and in 80 of these for the tirst time. 



Mr. Herbert L. Hawkins, M.Sc, F.G.S,, read a paper, com- 

 municated by Dr. F. A. Bather, M.A., F.R.S., F.Z.S., on " The 

 Anterior Ambulacrum of Uchinocardium cordaiimi emd the Origin 

 of Compound Plates in the Echinoidea."' It contained the de- 

 scription of a new method of exposing sutures in recent Echinoids 

 suitable for photographic purposes, the process combining staining 

 with etching, and the description of the complex plating of 

 ambulacrum III, in E chinocardiuni cordatum. The origin of 

 ambulacral " plate-crushing," founded on a brief survey of the 

 phenomenon in all groups of Echinoids, was discussed. Mechanical 

 growth-pressure was regarded as the cause, with the growth of 

 tubercles (Lambert's hypothesis) as a secondary and merely modi- 

 fying agent. 



Mr. G, P. Parran presented a paper, communicated by Dr. W. 

 T. Calman, F.Z.S., entitled " Plankton from Christmas Island, 

 Indian Ocean. — II. On Copepoda of the Genera Oithona and 

 Paroithonar This collection, made in 1908 by Sir John Muri-ay, 

 K.C.B., F.R.S., and Dr. C. W, Andrews, F.R.S., contained eleven 

 species of Oithona and one of Faroithona, or rather more than 

 half the known species, the total number of known species of 

 Oithona being eighteen and of Paroithona two. This indicated 

 the great richness in species of collections made in ti-opical waters. 



