204 



Comparative Animal Physiology 



TABLE 31 (continued). DISTRIBUTION OF URICOLYTIC ENZYMES 



+ indicates presence; — indicates absence. 



is given by Florkin and Duchateau, ■^''' and a general summary by Florkih. -^'^ 

 Table 31 and Figure 36 summarize the results. 



Some of the ammonotelic invertebrate animals also degrade purines to 

 ammonia. Uricase is indicated in actinians, uricase and allantoinase are indi- 

 cated in echinoderms; allantoicase and urease have not been looked for in 

 these groups. All four enzymes occur in chloragogue tissue of Sipunculus, and 

 in "liver" of Mytiliis, crayfish, and lobster (Table 31). In the flatworms and 



