43^ 





OBJECTS EXHIBITED, WITH NOTES. 

 March 2nd, 1900. 



Mr. C. F. Eousselet ; Cladocera from the Baltic. A very 

 interesting admixture of marine {Podon and Evadne) and fresh- 

 water (Bosmina) types. 



Mr. E. Enock : Tracheal tube of larva of Hydroj)hiluSj showing 

 discontinuity of the internal fibre. (See " Note on the Tracheal 

 tubes of Insects, etc.," p. 405.) 



Mr, J. B. Scriven : Two sections of compound eye of Blowfly. 

 (1) Outer limitary membrane of retina viewed vertically. (2) 

 Transverse section of the dioptron. Each rhabdome consists of 

 seven long cells surrounding a central lumen. 



Mr. A. J. French : A Eadiolarian, Saticrnidus s])., from 

 "Challenger" Station 274, Central Pacific, 2750 fathoms. The 

 characteristic features are two concentric lattice spheres, the 

 extremities of the polar spines being joined by a circular ring. 



Mr. H. Morland : Front and side views of valve of Biddulphia 

 fossa Gr. and St. This species was first described by Messrs. 

 Grove and Sturt in their papers on the Oamaru deposit in the 

 Q.M.C. Journal about fourteen years ago. 



April 6th, 1900. 



Mr. G. West : A slide of Cwyne exhibiting the extraordinary 

 manner in which Diatoms cover all objects from the South 

 Devon coast. All who have worked this coast must have been 

 struck with the prodigality of Diatom life. 



Mr. H. F. Angus : Parasite of Malarial Fever. The slide 

 shows the form originally described by Laveran, and represents 

 an advanced stage in the development of the parasite. The 

 remains of the blood corpuscles in which the parasite developed 

 are still visible, and the characteristic black pigment formed by 

 the parasite from the haemoglobin of the corpuscles is also 

 shown. 



