384 MITCHEL CARROLL 
phase cells and might possibly be a chromosome fragment. No 
other departures from the numerical organization characteristic 
of the acrididaean complex were observed in over two hundred and 
sixty metaphases examined. These two hundred and sixty cells 
consisted of: two hundred first spermatocytes, distributed among 
sixteen cysts and thirteen follicles; fifty-nine second spermato- 
cytes divided among four cysts and three follicles, and one 
spermatogonial metaphase (the only one in the testis suitable for a 
count). 
An inspection of plate 5 will show that individual 2482 is also 
apparently perfectly regular with respect to its chromosome 
organization. This animal was collected in 1915 on San Juan 
Island, Puget Sound, Washington. From five to twenty (usu- 
ally ten or twelve) counts were made in each of fifteen first 
spermatocyte cysts and from one to three counts in each of eight 
spermatogonial cysts. These twenty-three cysts were distrib- 
uted among twenty-one follicles. There were no second sperma- 
tocytes containing mitotic figures in this testis. | 
Systematic counts in individuals 951 (collected on Oreas Island, 
Puget Sound, in 1909) 2503, and 2518 (both collected on San Juan 
Island, Puget Sound, in 1915) failed to reveal anything unusual or 
irregular in the numerical organization of the chromosome groups 
of these animals. No conditions were found differing in any 
respect from the complexes illustrated on plates 2 and 5. The 
figures on these plates represent, in fact, the typical conditions 
in the material I have examined thus far. 
CHROMOSOME GROUPS OF ABERRANT INDIVIDUALS 
A. The counts from atypical animals 
Striking variations in the chromosome complex were first dis- 
covered in individual 950. This animal was collected on Orcas 
Island, Puget Sound, Washington, in 1909. Soon afterward the 
testis was sectioned and mounted, but not studied in detail until 
it was loaned to me a couple of years ago. For the reason that 
the slides are in poor condition, many sections of the testis being 
missing, an analysis of the chromosome counts is not possible. 
