Brooks and Rittenhouse.— On Turritopsis. 
EXPLANATION OF PLATES. 
PLATE 30. 
The anatomy of Turritopsis. 
Letters of reference; a, peripheral region of radial canal; b, central region 
of radial canal; c, groove through which the radial canal communicates with 
the stomach; d, cavity of stomach; e, reproductive organ; /, ectodermal 
epithelium of subumbrella. 
Fig. 1. Transverse section in the plane of the reproductive organs. 
Fig. 2. Transverse section a little above the reproductive organs. 
Fig. 3. Transverse section through the proboscis. 
Fig. 4. The adult Turritopsis in side view, enlarged about twelve diameters. 
Fig. 5. Transverse section through the oral lobes. 
