250 ix'ij('0\i:fn' rh'o.u A.\A/Jh'OBiosi8 



ficient to completely oxidize 1/5 of (lie lactic acid that 

 was found to have acciiimdated in the body dui'ing anaer- 

 obiosis; thus, the proportion between excess oxygen and 

 lactic acid was the same as in vertebrate muscle. It is 

 therefore tempting to assume that the remaining 4/5 

 were ]-esynth(^sized to glycogen, but direct glycogen de- 

 terminations have so far not been made. 



In the cockroach, on the contrary, the excess oxygen 

 consumption w^as much too high to allow a similar con- 

 clusion (Davis and Slater, 1928). The ratio between lac- 

 tic acid and excess oxygen would rather indicate that all 

 the lactic acid was completely oxidized and that no re- 

 synthesis of carbohydrate occurred. 



It w^as mentioned in a previous section that Gilmour 

 observed in various insects an excess oxygen consump- 

 tion far greater than expected. He (1941) emphasized 

 the fact that in Tenehrio the above-mentioned synthetic 

 processes leading to the formation of carbohydrate are 

 sufficient to account for only a small part of this excess 

 oxygen consumption, but he was unable to correlate the 

 remainder with any specific process. On the whole, Gil- 

 mour 's experiments (1940a, 1941a), on Cryptocercus and 

 on grasshopper muscles led him to believe that the ex- 

 cessive repayment of the oxygen debt involves the oxida- 

 tion of a greater part of the acids formed during anaero- 

 biosis than occurs in vertebrates; in other words, his 

 views and those of Davis and Slater have a common 

 ground. 



Still less is kno^vn as to whether any reactions involv- 

 ing fat or protein take place during recovery from an- 

 aerobiosis. Neither Harnisch (1938) nor Gilmour (1941) 

 found any decided changes in the fat content during the 

 recovery of the larvae of Chironomus and Tenehrio, 

 with which they respectively worked. 



Bi'aconnier-Fayemendy (1933) showed that during a 

 48-hour period in the presence of air, following a 24- 



