38o EXPLANATION OF PLATES 



Fig. 64a. Suprarenal and Median Cloacal Arteries of the Male, X 2^. 



Fig. 65. Reconstruction in the solid of the Lateral Vein, Lateral Lymphatic Trunk, and 

 Lateral Lymph Hearts, seen from the ventral side, after Hoyer and Udziela. 



Fig. 66. Ditto, seen from the dorsal side. 



Fig. 67. Horizontal Longitudinal Section of the Lateral Vein and Lymphatic Trunk 

 showing the Lateral Lymph Hearts. Modified after Hoyer and Udziela, and repre- 

 senting the larval condition. 



PLATE XVIII 



Fig. 68. Lymphatics of the Pectoral Region and of the Floor of the Mouth, ventral view^. 

 On the left side of the figure the subscapular, the thyroid, and the hypoglossal 

 lymph sinuses have been removed and the deeper sinuses exposed. Somewhat 

 schematized. Subcutaneous network not shown. 



Fig. 69. Lymphatics of the Pelvis. On the left of the figure the skin and subcutaneous 

 network only have been removed, and on the right the superficial sinuses and 

 the pelvic girdle, as well as a portion of the vesicular sinus, have been cut away so as 

 to expose the deeper sinuses. Somewhat schematized. 



PLATE XIX 



Fig. 70. Blood-vessels and Lymphatics of the Palate, seen from the ventral side. The 

 blood-vessels are shown on the right of the figure and the lymphatics on the left. 

 The arteries are striped, the veins left clear, and the lymphatics are black. 



Fig. 71. Transverse Section through the Anterior End of the Cloaca of the Male showing 

 the urino-genital papillae and the opening of the bladder. Schematized, X 9. 



PLATE XX 

 Fig. 72. Female Urino-genital System, seen from the ventral side. The left ovary and 

 the posterior portion of the right oviduct have been removed. The cloaca has been 

 split open mid-ventrally, and the left lung has also been removed. 



PLATE XXI 



Fig. 73. Male Urino-genital System, ventral view. On the left of the figure the lung 

 and a portion of the mesorchium have been removed, and the Wolffian duct cut 

 through at its entrance into the cloaca and turned over to display the ureters. On 

 the right the lung, fat-body, testes. Wolffian duct, and ureters are in their normal 

 positions, but the ventral portion of the cloacal gland has been removed. 



Fig. 74. Diagrammatic Representation of the Male Urino-genital system to show the 

 course of the sperms through the kidney and Wolffian duct to the exterior. Vasa 

 efferentia black. Wolffian duct and its tributaries striped, and the ureters dotted. 



PLATE XXII 



Fig. 75. Alimentary Canal and its Associated Glands and the Hepatic Portal System, 

 seen from the ventral side. The mesentery has been cut to allow the intestine to be 

 displayed, and the cut edges are indicated by a double dotted line. The liver is 

 turned over to the right (left as viewed). (The plica gastro-lienalis and p. recto- 

 lienalis not shown.) 



Fig. 76. Dissection of the Gall-bladder and Bile-ducts seen from the ventral side. A 

 portion of the right lobe of the liver and the head of the ventral pancreas have been 

 removed in order to display the ducts. 



