PART III.] Hismatozoa in Ceylon Red Deer and in the Carp, . 6ii 



body is furnished with cilia, which " are raised on a substructure of a wave-like appear- 

 ance " (Fig. 58). They were found on three occasions apparently each time the blood 

 of this deer was examined. Unfortunately measurements have not been furnished, but 

 they are described as being too large to pass through the capillary vessels. In the 

 same plate a figure is given of the red blood-corpuscles of the same deer, and their 

 diameter is stated to be ^ J^^ inch. If the figures of the haematozoon have been drawn 

 to the same scale as the corpuscles, it may be inferred that the length of the parasites 

 would correspond to the diameter of about 20 human red blood-corpuscles, or about "16 

 mm., and the greatest width about 'Imm. 



They will continue alive under the microscope for about an hour. After death 

 three bands, resembling muscular fibre, are seen to traverse the body longitudinall} , 

 but these are not visible during life. 



It does not appear that either the frogs or the deer had been in any way incon- 

 venienced by the presence of these protozoa in their circulation. 



Protozoa have also been found in the blood of the carp by Wedl. They are spoken 

 of as being Olobularia radiata, and were observed 

 to have been especially abundant during the summer.* 



The foregoing section contains a brief account of 



all the protozoa of this character, regarding which I 



have been able to collect information, unless it be 



considered that the organisms referred to by M. 



Davaine in his well-known work on parasites as having 



been observed by Klencke and Gros belong to the 



same category. According to M. Davaine, Klencke 



,..,.,i,iiP re • r Fig. 58. — Protozoon obtained in the bloo 



detected m the blood of a person suflfermg from ^^^^^^^ Original figure reduced to 



vertigo " des animaux semblables aux infusiores ; " and half size. (After Boyd Moss.) 



M. Grros is said to have obtained them in the blood of 



persons affected with syphilis.! This description is not sufficiently precise to warrant 

 any opinion being expressed as to their character. 



The remaining hsematozoa of man and animals belong, so far as I am aware, to 

 the helminthic group. As it is proposed specially to refer only to such of them as are 

 of microscopic dimensions, their description need not occupy more than a few pages. 



III. HELMINCHEG HE\IA.TOZOA OF MAN AN^D ANIMALS. 



A.— Trematoid Hsematozoa. 



With regard to the helminths which have been found in the blood, it may be stated 

 generally that, with one exception, they all belong to the nematoid group. The excep- 



* Jahreshericht Von. J. Victor Carus, Zeitschr. f. d. wissen. Zoologie. Band VII — " Supplement-Heft." 

 1856, p. 35. 



t Op. cit., IT Edit., p. 317. 



