MORPHOLOGY OF MELIBE 591 



Fig. 60. — Schematic drawing of the kidney. Ab, anterior branches ; 

 Pb, posterior branches ; P, point of communication with the pericardium ; 

 Es, renal syrinx ; U, ureter ; Up, uretero-connexion with the renal 

 syrinx. 



Fig. 61. — Section through the renal syrinx showing its connexion with the 

 ureter {Ur) and pericardium (Rs). Note the arrangement of the cilia of 

 the renal syrinx ; Pw, pericardium, (n.p.r., c.l.) 



Fig. 62. — From A, in fig. 61, showing the transition of the epithelium 

 from ciliated to non-ciliated, (h.p., c.l.) 



Fig. 63. — From B, in fig. 61, showing the cyncitial relation of the cells, 

 (h.p., c.l.) 



Fig. 64. — Section through the renal syrinx showing complete connexion 

 with the pericardium, A-A. Crs, cavity of renal syrinx ; PI, plica or 

 villus of the cyncitial plate ; ?7r, ureter, (n.p.r., c.l.) 



Fig. 65. — A-A in fig. 64. PI, villus of the cyncitial plate, x 107. 

 (l.p., c.l.) 



Fig. 66.— From 5 in fig. 64. P/, plica or villus, (h.p., c.l.) 



Fig. 67. — The cyncitial plate with villus {PI), (h.p., c.l.) 



Fig. 68. — From the wall of the renal syrinx. Cil, ciliated columnar cells 

 lining the organ ; Sw, syringeal wall covering the epithelium, (h.p., c.l.) 



Fig. 69. — A single cell from the wall of the renal syrinx showing its 

 remarkable structure. Bg, basal granules ; Bm, basement membrane. 

 X 1,013-4; (o.i., c.l.) 



Fig. 70. — Cross-section of a renal branch. Ct, connective-tissue capsule ; 

 Pr.neph, periodically functioning cells. X 267. 



Fig. 71. — Section from the wall of the ureter. Ent, internal border ; 

 Ex, external cover ; Nu, nucleus ; Nuco, nucleolus. 



Fig. 72. — Longitudinal section of the ureter nearer to the kidney than 

 that part shown in fig. 71. Note the glandular condition, x 1,013-4; 

 (o.i., c.l.) 



Fig. 73. — Microphotograph of a cross-section of the body in the region 

 of the prostate coils of the female genital tube. Hep, hepatic branch : 

 Int, intestine ; Pro, large coils of the prostata ; St, stomach ; Vd, vas 

 deferens, x 14. 



Fig. 74. — Microphotograph of a cross-section through the region of the 

 mucous gland. Fd, food in the stomach ; Hep, section of the liver ; 

 Mg, mucous gland ; P, penis ; Sept, ovispermatotheca ; Vg, uterus. 

 Xl4. 



Fig. 75. — Microphotograph of a cross-section of the posterior part of the 

 penis. Lm, lumen. Two lumina are shown owing to the coUing of the 

 organ in this region, x 15. 



Fig. 76. — Microphotograph of a trans-section of the body in the region 

 of the brain. Cg, cerebral ganglia ; P, penis ; Mg, mucous gland, x 14. 



Fig. 77. — Microphotograph of a trans-section of the body in the region 



