194 PROCEEDINGS OF THE NATIONAL MUSEUM vol. in 



appareutly subserve some highly speciahzed sensory fuuctioii. They 

 may well have been "invented" a number of times in quite different 

 organisms. One is reminded in this connection of the example of 

 the eyes of squid and of vertebrates, organs that are gi-ossly quite 

 similar but not homologous. I beheve that the posterior geminate 

 setae serve a special sensory role of some sort and that thej^ will 

 prove important systematically once thej^ have been investigated on 

 a sufficiently broad scale. 



Note I, the Statumen: The signal characteristic of the Chileno- 

 philinae is the thickened sclerotic ridge running obliquely forward 

 on each second maxillary coxosternite and passing ectal to the max- 

 illary pore. To resolve the confusion that has arisen from the ap- 

 plication of numerous phi-ase designations in each of the major 

 languages, I have proposed that this ridge be given a single Lathi 

 name, "statumen" (strut or support, pi. "statuminia"). Future 

 studies may show that the definition of the statumen given above 

 may require further restriction since there is some evidence to sup- 

 port the suspicion that not all statuminia are homologous; i.e., some 

 kinds may have arisen through evolutionary convergency. If this 

 convergency can be proved, then it could follow that the group now 

 recognized as the Chilenophilinae, (or Chilenophilidae) would require 

 a general reorganization, possibly involving at least a partial fusion 

 with fractions of the pachymeriine Geophilidae. 



