94 



Für Auskunft und Führung halten sich einige jüngere, durch 

 weiße Schleifen gekennzeichnete Herren (von Montagabend an) zur 

 Verfügung der Teilnehmer im Hotel Viktoria bzw. in der Technischen 

 Hochschule bereit. 



Einheimische und auswärtige Fachgenossen, sowie Freunde der 

 Zoologie, welche als Gäste an der Versammlung teilzunehmen wünschen, 

 sind herzlich willkommen. Der Schriftführer. 



E. Korscheit (Marburg i. H.). 



3. Transvaal Biological Society. 



eingeg. 7. April 1908. 



The first regular meeting of the Transvaal Biological Society took place 

 on the 17th January, 1908 in the Transvaal Museum, Dr. Theiler, C.M.G. 

 in the chair. The general business of the meeting having been accomplished, 

 the following papers were read: — 



Mr. Howard »A new Species of Tick found in the Transvaal«. Cotypes 

 of Ixodes pilosus hoivardi Neum., were exhibited, these specimens have been 

 deposited in the Transvaal Museum. The original description will appear in 

 the Transaction of the Philosophical Society. 



Dr. Frei. On »Viscosity of Blood«. Colloids, suspensions and emul- 

 sions have a higher viscosity than solutions. Blood is physically a suspension 

 of cells in a colloid, the plasma. As the blood stream is subject to the law 

 of Poiseuille (Hess) the viscosity of the blood directly affects the work done 

 by the heart. The examinations (carried out with the viscosimeter Hess, 

 which is specially made for clinical purposes) demonstrate that the viscosity 

 of blood is much higher than that of serum, nearly double; it is directly pro- 

 portional to the number of erythrocytes, as compai'ative experiments with 

 artificial suspensions of red blood corpuscles in serum and 0.9 % XaCl prove. 

 Clinical examples : Haemolysis, piroplasmosis and artificial anaemia in horses 

 show a low viscosity of the blood. CO2 increases the volume of the red blood 

 cells and the quantity of albumen (colloid) sugar and fad in the plasma 

 (Limbeck. Hamburger and other authors) the viscosity of the blood was 

 in accordance found higher in cases of artificial stasis (strangulation of a vein) 

 and in pathological stasis. Clinical axample: excess of CO2 in agony causes 

 a higher viscosity of the blood. 



Dr. Gunning. »Demonstration of a diseased Skull of Papio porcarus 

 (Bodd).« The dentition shews striking abnormalities, and the bones are pe- 

 culiarly malformed, probably by rachitis and osteoporosis. The teeth have 

 forced their way to the surface, apjjearing in the most abnormal positions, 

 such as on the upper surface of the maxilla, or in the nose. Where teeth are 

 wanting in their natural position, the alocoles are obliterated and filled up 

 with a spongy growth. The bones of the head are much thickened, being 

 light and soft and spongy in texture.« 



Dr. Gough. »Demonstration of some stages in the Life History of 

 Strongylus contortus Bud. « »The larvae can develop and Life in moist dung, 

 away from water, living larvae being found in dung kept for four months in 

 a moist chamber. Infection of sheep takes place from dirtied grass as well 



