183 



the " teeth " are formidable organs, and the basal portion is 

 considerably thickened. 



Mr. T. A. O'Donohoe : An adult Acarus and four young ones 

 found on a sun-flower. When captured the mother was carrying 

 its young on its back. 



Mr. A. Earland : Globigerina Ooze, from 1290 fathoms (about 

 1| miles), Indian Ocean, showing Globigerina aequilateralis, etc., 

 imbedded. One specimen has the outer whorl of chambers 

 removed, and exhibits the spinous armature on the surface of the 

 early chambers. All the pelagic Globigerinae are covered with 

 similar spines, but they are of such a delicate nature as to be 

 dissolved by the carbonic acid in solution in the sea-water during 

 the long process of sinking to the bottom after the death of the 

 animals. 



May 17th, 1901. 



Mr. R. T. Lewis : Black currant mites, Phyto2)tus ribes, which 

 of late years have done serious damage to the fruit crops in 

 England. 



Mr. J. T. Holder : Ephemera larva under dark ground illumi- 

 nation. The branchial plates are covered with Yorticella. The 

 circulation of blood under the eye is very noticeable. 



Mr. C. F. Rousselet : Mounted specimen of Brachionus militaris 

 from China. 



Mr. C. Turner: Head of Whirligig Beetle, Gyrinus natator, 

 showing the two pairs of compound eyes. 



Mr. A. Earland: "Red Rain," which fell at Melbourne, 

 Austraha, on December 27th, 1896. Contains disintegrated 

 siliceous and mineral fragments, diatoms, etc., believed to be 

 derived from the Central Australian Desert, where the particles 

 are lifted up into the higher regions of the atmosphere by the 

 agency of " dust-devils," or vortex storms. 



Mr. J. Rheinberg : Section of Echinus spine, shown under low- 

 power colour illumination. 



