195 



Das Agassiz'sche Experiment ist der einfachste und klarste 

 Ausdruck dieser Verhältnisse. Wenn der Fuß ausgestreckt wird, ver- 

 lieren die im Schalenraum gelegenen Organe an Volumen, der Schalen- 

 raum selbst wird durch das weitere Auseinanderklaffen der Schalen- 

 hälften vergrößert und das vom turgescenten Fuße verdrängte Wasser 

 läuft in den Schalenraum. Ein Steigen des Wasserniveaus kann daher 

 unter keinen Umständen stattfinden. 



Eben so einfach ist die Erklärung des von Carrière beschrie- 

 benen Versuches. Bezüglich der näheren Details verweise ich auf 

 meine größere xirbeit. 



III, Mittlieilimgeii aus 3Iuseen, Instituten etc. 



1. Zoological Society of London. 



3rd March, 1SS5. — Dr. E. Hamilton made some remarks on the 

 supposed existence of the Wild Cat [Felis cuius) in Ireland, as stated at a 

 former meeting, observing that there was no record of the Wild Cat being 

 indigenous to that country. Dr. Hamilton believed that the Cat shown at 

 the meeting in question was only the offspring of domestic Cats born and 

 bred in the woods of that district. — A letter was read from Mr. J. H. Thom- 

 son, C.M.Z.S., giving the locality of Helix [Hemitrochus] ßlicosta, which 

 had been previously unknown. — Dr. A. Günther, F.R.S., exhibited and 

 made remarks on the skin of a singular variety of the Leopard which had 

 been obtained in South Africa. The back in this specimen was black and 

 the tail reddish grey, while the usual characteristic spots of the ordinary 

 Leopard were nearly altogether absent. — Mr. H. H. Johnston, F.Z.S., 

 gave a general account of the principal animals observed by him during his 

 recent journey to Kilimanjaro and his stay on that mountain. — Mr. Old- 

 field Thomas read a report on the Mammals obtained and observed by Mr. 

 Johnston during his expedition. — Capt. G. E. Shelley read a report on 

 the birds collected by Mr. H. H. Johnston in the Kilimanjaro district. The 

 collection contained examples of fifty species, six of which were believed to 

 be new to science. — Mr. Charles O. Waterhouse read a paper on the 

 insects collected on Kilimanjaro by Mr. H. H. Johnston, and gave the de- 

 scriptions of six new species of Coleoptera, of which examples occurred in 

 the collection. — Prof. F. Jeffrey Bell read a description of a Nematoid 

 Worm [Gordius vermcosus] obtained by Mr. Johnston on Kilimanjaro, which 

 was found to be parasitic on a species of Mantis. — Mr. E. J. Miers com- 

 municated the description of a new variety of River-crab of the genus Thel- 

 phusa [T. depressa Krauss, var. Johnstoni) which had been obtained by Mr. 

 H. H. Johnston in the streams of Kilimanjaro. — Mr. Francis Day read 

 the fourth of the series of his papers on races and hybrids among the Sal- 

 monidae, continuing the account of the Howietown experiments from No- 

 vember 1884 to the present time. — Prof. Ray Lank ester read some 

 notes on the heart described by Sir Richard Owen in 1841 as that of Aptéryx, 

 and came to the conclusion that the heart in question was that of an Ornitho- 

 rhynchus. — P. L. Sciate r. Secretary. 



