|)r. ('iii,iii|)l.(tii OH hisccldii <(': i]l //n'o/xxldii Slnichircs. ,'Vl I 



.sli(>\viii<i; wliiil. piirpoiis l.o \)v iJi<> " .sii|)<'rliii<^'ii;i,l ikmito- 

 iiHM'c ' of a, (li,stinc(. .S('<j;m(Mil,, vvliosi^ ii.|>|)(Mi(la,;j;('.s iirc .sup- 

 posed 1,0 be. 1,1h' siip(M'liii«j;iiiU', liiiH Ixmmi widely copied jiiid 

 referred to in i<'eenl, (Mit-omolofjiicid lil,(Mii.(.nre. I^'oIhoiu's 

 ()l)Kervul/ioiis in iliis mutter, however, liji,V(^ been .shown t<» 

 be utterly unfoun(h'd by .such inve.sti<j;ii,toi's ii.s lMiih|)- 

 tschenko, who h.i.s mjuU^ a eurefiil .stu<ly of the <'inbryo- 

 ]ofj;ieiil (levelo|)nient of i\u\ s;une ji;roup of iu.sinit.s stiKhed 

 by l^'olsoni, a.nd it is inch'cd snrprisin<ij tha,t h'ol.soin's 

 conehisioiis huve been j>ra,eti<"i.lly uni V(M'.sully a,ee(>pted 

 union^ zoologists despite this fuct, and in the |"ji,e(^ of all 

 other enibryolofjjieal ('videncc^ brou<j;!it forwa,r(l in seon'S 

 of pajx'rs on (.he subject, in which it ha,s be<'n clearly 

 shown tha,t the ina.xillac of insects ai<' homologous with 

 the maxillula,e (liist ma..\illa.e) of (*insta.cea,, and the snp<'r- 

 lingua,(\ cainiot thei'ei'on^ l)e homologous with the nwixilluhu^ 

 (first ma.\illa,(\), a.s the <'a.si I y persuaded <'ntoinologists 

 would lia,V(^ us Ix'lieve ! 



The following ta.ble (in which I lia,v(^ eniploy<'d, in a 

 modilied forni, th(^ terminology used by lleymons, lUOl, 

 in his excellent ni()n()gra])h ol the development ol tScvIo- 



