Wood WORTH. — Phagocata. 



PLATE IV. 



Figs. 37 and 38 Two consecutive horizontal sections (30 ;u in thickness) from the 

 ventral side passing through the floor of the pharyngeal chamber. 

 Figure 37 is the more ventral, and sliows the marginal nerve ; the re- 

 lation of the latter to the longitudinal trunks is evident upon comparing 

 Figures 37 and 38. X 27. 



" 39 and 40. Two longitudinal sections, parallel witli the sagittal plane, through 

 the brain region. X 52. 



" 41. From an isolation preparation, showing one of the sub-hypodermal glands 

 from the region of the gonopore. X 700. 



" 42. A view of the sexual organs showing their relations to one another. The 

 figure was accidentally inverted by the litiiographer, thus bringing 

 the posterior end uppermost. Partially diagrammatic, X 35. 



" 43. Portion of a cross section of one of the lateral branches of the intestine. 

 X450. 



" 44. Portion of a section through a parovarium of an individual in which the 

 yolk glands were fully developed. X 680. 



" 45. Section through a portion of a yolk gland from the same individual as 

 Fig. 44. X 260. 



" 46. Sagittal section through the brain, showing the two commissures. X 60. 



" 47. Portion of a tangential section of one of the pharynges, to show tlie cell 

 boundaries of the external epithelium. From an isolated pharynx 

 killed in hot silver nitrate. X 350. 



