JOUENAL OF MICROSCOPIC Ai. SCIENCE. 



EXPLANATION OF PLATE XYIII. 



Illustrating Dr. Klein^s paper on the Structure of the 

 Omentum. 



Fig. 1 — 5. — From the fenestrated part of omentum of adult rat, drawa 

 under Hartnack, Eyepiece II ; Obj. 8 (camera lucida). 

 a. Connective-tissue trabeculae covered with endothelium. 

 h. Buds of young connective tissue (see text). 

 In fig. 3.^ — c. Endothelial membrane broken. 



Fig. 6.— From the fenestrated part of omentum of young dog. (Eyepiece 

 II; Obj, S.) 



a. Endothelial covering. 



b. Vacuoles between the connective-tissue bundles. 



c. Germinating cells. 



Fig. 7. — From the omentum of a guinea pig 3 — 4 weeks old. (Eyepiece 

 II; Obj. 7.) 



a. Holes which pass from one side of the membrane to the other. 



b. Vacuolated cells. 



c. Vacuoles between the bundles of connective tissue. 



Fig. 8. — From omentum of a guinea pig 3 — i weeks old. (Eyepiece II ; 

 Obj. S.) 

 a. Capillary vessels in the course of formation. 

 h and c. Vacuolated cells which by their fusion form a new capillary 

 vessel. 



