DESCRIPTION OF PLATES.' 



Plate I. Fig. 1. Fihiria noctunia (X about 390, double exposure), showing 

 the general morphology and the viscus-like organ at the 

 junction of the middle and posterior thirds of the parasite. 

 Fig. 2. Head end of Fihiria noctunia (X about 880). The sheath, 

 the three duct-like threads connecting the anterior end of 

 the viscus-like organ with the head end of the embryo, 

 and the transverse striations of the musculo-cutaneous 

 layer may be seen. 

 II. (Figures redrawn by T. Espinosa, anatomical artist of the Labora- 

 tory, from originals. ) 

 Fig. A. Represents a dead filaria showing granular degeneration. 

 Fig. B. Drawn from a filaria just before granular degeneration set 

 in. Proportions about correct as seen with the Zeiss 

 one-twelfth oil immersion compensation ocular No. 8. 

 Length, 0.330 millimeter; breadth, 0.00765 millimeter. 

 The distance between the anatomical markings were as 

 follows: A-B, 97.92 fi; B-C, 53.55 /x; C-D, 6L20 fi; D-E, 

 64.26 m; E-F, 53.55 fi; total, 330.48 ^ or 0.33 millimeter. 

 Fig. C. Head end of filaria showing retracted lips and spicule. 



' Photomicrographs by Chas. Martin, photographer of the Laboratory. 



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