AUTHOR’S ABSTRACT OF THIS PAPER ISSUED 
BY THE BIBLIOGRAPHIC SERVICE, JULY 12 
AN EXTRA DYAD AND AN EXTRA TETRAD IN THE 
SPERMATOGENESIS OF CAMNULA PELLUCIDA 
(ORTHOPTERA); NUMERICAL VARIATIONS IN THE 
CHROMOSOME COMPLEX WITHIN THE INDIVIDUAL 
MITCHEL CARROLL 
Zoological Laboratory of the University of Pennsylvania 
FOURTEEN PLATES (ONE HUNDRED AND THIRTY-NINE FIGURES) 
CONTENTS 
Tito cle OTe: ee Ayres eee entrar ey atetoe (eos eos ast te ey eee Ade aine Seale 376 
PS CODETOls tesa were Vee cts ee ee ee ats ue elet cers Slevin 376 
Bey Viatenialmandtacknowledomentsses as meee cr riciece elem einer 376 
Ca lechnique-and nomenclature... :).i.ccciniennee ects wt nee cele eies Bice he 378 
INN WOES ogg ab Snot 8 Oe OrmCne a oe Ee RE RCI RN OM cisco) EPO oA MN Re ores i nS ree 378 
APNG HO TNA ON. Gea O Giverny sce cscpsis crave rs eet an ear eie fa eacke EE MAGEE re cinta cee mtenancna cic 319 
Mhemonmalychromosome complexce sss. nase Sela eens eel seie 382 
Chromosome groups of aberrant individuals". 2. 22.2.6: 20400 sas-ach ose. 384 
AN, WMO COMMAS TON, Anyfoneall Ayoub 55 soc onocoucbpooosubboDoouODboE os4 
Bae ATialy SI SHO tsb hiescoUmibssers tes crk tn soe teen erent aiciaantsts mie mw atone 388 
Cy Uthe-extra, or'supernumerary elements: -..5.0.70. 4... 1.-h- 25sec: 399 
PING EG REG NYG Ce SR AR MO GE choc he Aa owe carer ee ee 401 
EVE SUPELMUMEeTALY LeCLAC..0. oss oe eet bo ale Nelo ae 403 
ihestiplordsextrashomolocues nee ee teeter ern ane 404 
D. Equational and reductional non-disjunction of the supernumeraries 405 
KE. Classes of spermatozoa in individuals with a varying number of 
SUP ELIMUM ChARICSr sritaneee he aside oer emery rab) oh eee eres cate veka» 406 
F. Summary of observations on the atypical complexes................ 407 
J DNSCCITRE STRONY I a2. Saree eee et etna felted ee clear td RC a RE gree Ae 408 
A. Extra elements and numerical variations in the complex in other 
OTR RST RED Le lala ts eo ete eae eee ls Geert ead Sch rh PR ern ce een 408 
Bee Navurevolsupernnuinerarlesas sateen Tees hrm rane kiana: ene: 410 
C. Source of the variations in the complex within the individual....... 414 
D. Accumulation or piling up of supernumeraries....................-. 419 
EK. The extra chromosome as a factor in heredity...................++. 420 
SUMMA Cr COM CIUSTOM scr. ales oie ss cca semOesemertreiave «vss lace aig honalalsie  epermses 421 
Bil MORTON OI. sain So. PO.O OR CE ETO LOLS Gn DtOcd Sas EIS GRC Orme s 423 
