-I IMKNUMKK \KY CHROMOSOMES IN CEl I Hnl'HILUS. 



nection with the mitotic stages ot maturation, but it seems to me 

 quite- unlikely that synapsis in all organisms follows one method; 

 and, moreover, I believe that the variations in method of synapsis 

 and intimacy of union of homologous chromosomes in different 

 forms will be found to he directly connected with variations in 

 method- i,f inherit. tin e >t" unit characters, especially in relation 

 to inter, li.m..- or Lick of interchange of maternal and paternal 

 genes. If thi- i- true \\e should expect to lind more cases of 



>f unit characters where telosynapsis or no 

 real svnap urs. If parasynapsis is an adaptation to secure 



in!- T< i hould expect to find cas< < ot tclvnap- 



sis folloucd IA parasynapsis, as indicated, but nor certainly 

 d.-iiion-traied in the guinea-pig (Stevens, 'l I, Figs. 9, 10, 11 

 In my -nnli< - on spermatogenesis of the Coleoptera 1*05, '06, 

 . I found evidence of telosynapsis in several cases and no 

 c\ iilt-iK of para^\ nap^is, but this was only an incidental mat ter 

 at i In- time, an. I . ; interest merely in relation to the s< 'ion 



oi uliolr i In - in the maturation mito-e<. It is ni\ in- 



trntion to nine all of my Coleoptera and I Mptrra material 



\\itli refer ih- (juestions whether para-vnap^U occur- 



in the Coleoptera, and whether the Diptera >ho\\ .m\ evidence 



ot Janssens 1 ehia-ma types of synapsis. 



i I;E. 



J.i : 2. 



LITERATURE CITED. 

 Agar, W. E. 



1 1 i i - -;is of Ltpidosirtn parad- 



I I. 

 Gregoire, V. 



'10 I le Maturation dans les deux K gn< . L'un H 11.- du 



IM. tiquo. La Cellule, XXVI. 



Janssens, F. A. 

 '09 >|ii-iin. dans les Batrachiens. 1 



ictations des cindses de inatuiatimi. La C.-llulc, XX\ . 

 King, H. D. 



'07 Ih<- >|..! 11.. i!. 'genesis of Bufo . Am. Jmirn. of Anat., \"1I. 



'08 I'ln- ' - of Bufo lentiginosus. Journ. of M>rpli., XIX. 



Morgan, T. H. 



'n An Attempt to Analyze the Constitution of the Chromosomes on the H. 



ni Si-x-limited Inheritance in Drosophilti. Journ. Exp. Zool., XI. 

 Schreiner, A. and K. E. 



'04 Dif Reiiiin.u-teilungen bei den Wirln Itinon. Ein Beitrag zur l-'iai;.' nach 



.ktiiin. Anat. An/.. XX1\". 



