Woodworth. — Phagocata. 



PLATE IV. 



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

 ventral side passing through the floor of the pharyngeal chamber. 

 Figure 37 is the more ventral, and shows 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 with 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 lithographer, 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 2G0. 



" 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 the cell 

 boundaries of the external epithelium. From an isolated pharynx 

 killed in hot silver nitrate. X 350. 



