CARPENTER, ON HUMAN PHYSIOLOGY. 287 
Fig. 20. 
Perpendicular section through one of Peyer’s patches in the lower part of the ileum of the Sheep. a, 
Lacteal vessels in the villi. 4, The superficial layer of the lacteal vessels (rete angustum). c, The deep 
layer of the lacteals (rete amplum). d, Efferent vessels provided with valves. e¢, Lieberkiihn’s glands. 
F, Peyer’s glands. g, Circular muscular layer of the wall of the intestine. , Longitudiual muscular layer. 
i, Peritoneal layer. 
A perpendicular section through the wall of the Processus Vermiformis (Man). a, Lieberkiihn’s glands. 
5, Solitary follicie. c, Lacteal vessels, surrounding but not penetrating the follicle. At d are seen the 
larger efferent vessels, provided with valves. 
