THE FROG. 



25 



ei>. Epithelium. 



/. Flagellum. 



fb. So-called fibrils. 



f.d. Fat drops. 



/.</. Fat globule. 



fl. Follicular epithelium. 



/.. Medullated nerve fibre. 



f.n'. So-called non-medullated nerve fibre. 



/.w. White connective-tissue fibres. 



j'.ij. Yellow connective- tissue fibres. 



ij. Layer of ganglion cells. 



ij.c. Cutaneous glands. 



ij.i. Inner granular layer. 



yl. Glomerulus. 



ij.o. Outer granular layer. 



ij.s. Germinal spots'. 



ij.r. Germinal vesicle. 



Im. Middle lamella. 



m. Matrix. 



ma. Marrow colls. 



m.c. Circular muscular layer. 



m.l. Longitudinal muscular layer. 



m.m. Muscular layer of mucous membrane. 



uiu. Mucin drop. 



n. Nucleus. 



ml'. Ranvier's node. 



nd". Schmidt's node. 



n.i. Inner nuclear layer. 



n.l. Layer of optic-nerve fibres. 



n.a. Outer nuclear layer. 



.. Nucleus of spermatozoid. 



p. Pia mater. 



/i.e. Pigmented epithelium. 



p.y. Pigment cells. 



ph. Sarcophragm (septal line). 



pi. Plasma. 



/i. in. Perimysium. 



p.n. Perineurium. 



l>o. Periosteum. 



p.o'. Osteogenic layer of the same. 



ps. Pseudopodium. 



r. Rods. 



r.e. Efferent renal vessels. 



sc. Sarcolemma. 



se. Serous (peritoneal) layer. 



sh. Primitive sheath. 



sh'. Medullary sheath. 



up. Processus spiralis. 



th. Uriniferous tubule. 



tb'. Ciliated segment of the above. 



ur. Ureter. 



v. Vein. 



v.c. Vascular connective tissue. 



