574 



Mr, A. Earland : A tick, caught under bark in Cassiobury 

 Park, Watford. Mounted in glycerine, without pressure. 



Mr. T. G. Kings ford : Head of flea, Pulex irr items, showing 

 mouth-organs, etc. Mounted in glycerine, without pressure. : 



September 4th, 1903. 



Mr. T. N. Cox : Leaf of Deutzia (? species), showing stellate 

 hairs. The leaves of another species (D. scahra) are so rough 

 with siliceous hairs that they are used by joiners in Japan for 

 polishing wood. 



Mr. A. E. Hilton : The hornwort, Ceratophyllum suhnersum, 

 showing fructification. 



Mr. A. W. Dennis : Prothallia of Royal Fern, OsmvAida. The 

 spores producing these prothallia were sown five weeks ago. 



Mr. A. J. French : Batrachospermum moniliforme, from a 

 shallow pond near Leytonstone. Preserved in 2| per cent, 

 formalin. 



Mr. H. S. Martin : Section of rhyolite, a volcanic rock 

 showing " flow structure." From Yellowstone Park, U.S.A. 



September 18th, 1903. 



Mr. W. Wesche : Larva of Psychoda sp. The genus Psychoda 

 belongs to a small group allied to the gnats. The species shown 

 is very close to P. phalae7ioides, but is probably distinct. This 

 larva is very rarely met with, though the flies are common. 

 It anchors itself to the surface film by the setae on the tail. 



Mr. A. Earland : Section of marine limestone, Miocene strata, 

 Gozo, Malta. Chiefly composed of remains of a calcareous alga, 

 Halwieda. Foraminifera few in number. 



Mr. A. E. Hilton : Desmids, diatoms, algae, amoeba, etc., 

 from Millwood Tarn, Dalton-in-Furness. 



Mr. H. S. Martin : Section of pitchstone (glassy volcanic rock) 

 from Isle of Arran, Scotland, showing arborescent grouping of 

 the crystallites. 



