2164 Journal of Applied Microscopy 



nification, and it can be washed in 



'^^"; ;■'- -'■--..-_ ' / ' water, and is now ready to be mounted 



- - -^^^- ■ '. ' ■ / - - in glycerine jelly by the usual process. 



- ^^^ # When once one has a large piece 



^^ms^K^^*'^*^'^*'*^ stained and in glycerine, it may be cut 



' ..^^^ '"^° pieces of a suitable size to mount. 



'^^g^^_^^f^^"^^^s;5jj. One can frequently get a dozen prepa- 



^^^ ^*^%K " rations from one large piece. 



/ ^ ^V This simple process gives very 



' I %!, beautiful results and avoids the use of 



", - .. f expensive re-agents and is not difficult 



.. ., to manipulate. 



Figures '1 and 3 were drawn by Mr. 

 A. J. May from preparations made by the method described above. 



Meissner's plexus can be prepared by the same method. 

 Zoological Laboratory, Syracuse University. W. M. SmallwOOD. 



On the Occurrence of Parasites in the Blood of the Damonia 



Revesii Turtle. 



Since Laveran has shown that malarial fever is caused by the presence of 

 parasites in the blood, many investigations covering this subject have been 

 made, and in consequence the life history of the malarial parasites has now 

 been pretty thoroughly investigated, and their morphology fairly well under- 

 stood. 



There is, however, another class of heematozoon, belonging to the haemospo- 

 ridia family, which invades the blood of birds, reptiles and batrachians, of which 

 not so much is known, though likewise of much interest, and it is upon this sub- 

 ject that I propose to say a few words to-night. 



The generic name of haemosporidia, which I have used in this article, was 

 proposed by Celli and Sanfelice and adopted by Kruse. 



The hgemosporidia are corpuscular parasites, and during ochizogonia inhabit 

 the red blood cells, and only occasionally are they found in other parts of the body. 



In the case of birds and mammals, sporogonia of the better known haemo- 

 sporidia takes place extra-corporeally, in the intestine of the mosquito. It is also 

 probable that in the case of cold-blooded animals there is no change of host, 

 and that sporogonia takes place in the blood cells of the infected animal. 



The haemosporidia bear a near relationship to the coccidia, and in conse- 

 quence might be designated as the blood-infecting coccidia, and in order to dis- 

 tinguish them from the true coccidia, which invade certain organs of the body, 

 and not the blood. 



In its youngest stage the blood-infecting haemosporidium appears as a very 

 small unicellular amoeboid body. In growing they change their shape, which 

 may more or less conform to the contour of the invaded blood cells. 



