PARASITES OF A CUAPMAN's ZEBRA. 447 



this iatei'nal corona are six longer sharply-pointed ones. They 

 are also more refractive. 



Text-fia-ure 2. 



Cjjlichiiostomum zehrce, sp. n. 

 Anterior end of bodj'. View from above. 



Text-fioure 3. 



Cyliehiiostommn zehvce, sp. n. 

 Anterior end of bod}'. View from dorsal side. 



The condition of the leaf crowns in C. zebrce recalls that in 

 G. hicoronatum and C. euproctus, for in these three the internal 

 leaf crown consists of fewer leaves than the external crown. In 

 other Cylichnostomes the I'everse of this is the case. 



