Occurrence of Fnt 405 



present in the kidney. The interstitial cells of the testis are loaded 

 with small fat droplets. Most of the fibers of the psoas muscles 

 and the lumbar portion of the erector spinse contain a few fine drop- 

 lets. No fat was found in the flexor muscles of the thigh. The 

 cartilage cells of the centra and neural arches contain fat droplets 

 (Fig. 2, Ph I). On the edge of the ossification center the swollen 

 cells contain a large amount of fat. This may be the normal process 

 of degeneration for these cells. 



14 cm. foetus. The cells of the convoluted tubules of the deepest 

 part of the renal cortex are full of fat droplets. A few fine fat 

 droplets are present in the branched cells of the renal preadipose 

 tissue. The cartilage of the innominate bone contains fat — one or 

 two droplets to a cell. A few fine fat droplets are present in the fibers 

 of the psoas muscles. 



14 cm. foetus. A few fine droplets are present in the fibers of 

 the adductor muscles of the thigh. Fine droplets are found in the 

 cartilage cells of the vertebra?. ISTo fat is found in the trachea, 

 oesophagus, or muscles of the neck. The liver contains a large 

 amount of fat. There is a large amount of fat in the ovary — nearly 

 all of it in the cortex. The spleen contains no fat. In the inguinal 

 region some exceedingly fine fat droplets are present in the branched 

 cells of the preadipose tissue adjacent to a large blood vessel. 



17 cm. foetus. 'No fat is found in the kidney. Some fine fat 

 droplets are seen in the cells of the renal preadipose tissue." Fat 

 droplets are found inside the fibers of the psoas muscles (Figs. 3 and 

 4, Plate I). The cells of the innominate cartilage contain fat 

 droplets (Fig. 5, Plate I). 



20 cm. foetus. A few fine fat droplets are present in the renal 

 epithelium — mainly in that of the convoluted tubules. A few fine 

 droplets are also found in the cells of the renal preadipose tissue. 

 The cartilage cells of the vertebrse nearly all contain fat droplets. 

 The muscle fibers of the erector spinse and psoas muscles nearly 

 all contain one or more fat droplets in each section. 



^Tliese droplets ran be seen clearly only with the oil-immersion lens. 

 Their identification as fat droplets in this specimen is not absolutely cer- 

 tain. 



