408 
W. X. V. WOODLAND. 
Text-fig. 4. 
external to gland). 0. Sq. E}>. Outer layer of squamous epi- 
thelium forming external wall of Llood-sinus. I. Sq.Ej). Inner 
layer of squamous epithelium (forming inner wall of hlood- 
sinus). D. Sq. Ep. The doulde layer of squamous epithelium. 
I. C. D. Invagination of duct-cells. Note absolute distinction 
between duct (C.D.) and kidney cells (M.C.) with striated 
border (Str. B .) — intermediate types do not exist. ( X 296.) 
