STOLON EOEMATION IN SPECIES OF TRYPANOSYLLIS. 437 
NuiiBER OP Segments Concerned in the Region of 
Proliferation. 
lu two of the examples sectioned it was possible to distin- 
guish clearly that the proliferating cushion occupied a part of 
Text-fig. 7. 
Longitudinal section as in Text-figs. 3 and 4, but more laterally, showing 
distribution of gonads in stock and apiiendage, and extension of 
coelom into proliferating cushion. div. Diverticula of coelom. 
I.S.. 1.S-. Last three segments of the stock, f/a^. First segment 
of the genital appendage. Other letters as above, x 70. 
the two segments of the stock (T. gemmipara, Text-figs. 
4, 6) T. crosslandi, 'I'ext-fig. 1). In Text-fig. 6 of T. cross- 
la ndi it is probable likewise that two segments have been 
concerned. In the long-drawn-out terminal part w'e pro- 
