LIMNOCNIDA TANGA NICiE. 
99 
Text-fig. 3. 
1 . 
t. 
S.IL 
% 
Outline sketches of two longitudinal sections of older medusa- 
buds : 1. A cavity has appeared in the thickened ectoderm of 
the apex, into which the perradial tentacles are beginning to 
grow. 2. Almost fully formed medusa in which the velum 
is already perforated and the perradial tentacles well developed. 
In this specimen there is no sign of a manubrium, although the 
mouth and the manubrial endoderm (x) are indicated, e. Cavity 
of the entocodon. r.p. Perradial pouch of endoderm. s.u. Sub- 
umbrella cavity of the older bud. t. Tentacle, v. Velum. 
