60 



EDWARD T. BROWNE. 



DESCRIPTION OF THE PLATES. 



KEY TO THE LETTERING OF THE PLATES. 



ad., 

 ad.f., 



*>, 



c., 



ca., 



cc., 



cm., 



dc., 



ec., 



ec. c., 



en., 



ex., 



gd., 



inter, c., 



k., 



w., 



mb., 



mes., 



mesen., 



n., 



ec., 



adhesive pad (Lucernaria). 



adhesive disc of the foot (Lucernaria). 



basal bulb. 



cordylus. 



cavity of the peduncle (Lucernaria'}. 



circular canal. 



circular muscles. 



diverticuluin of the circular canal. 



ectoderm. 



ectodermal cavities. 



endoderm. 



exumbrella. 



filament of the stomach. 



gonad. 



genital duct. 



interradial canal. 



canal in foot of Lucernaria. 



mouth. 



marginal bulb. 



mesoglaea. 



mesentery. 



nematocysts. 



ocellus. 



oc. I., 



or., 

 of., 

 ov., 



P; 



per., 

 per. c. 



r., 

 rh., 

 rh. c., 

 rh. I, 

 s.p., 



Sjlt., 

 St., 



st. r., 



t., 



ta., 



tc., 



n., 



UW., 

 V., 



ocular lobe (= rhopaliar lobe). 



oral lip. 



otocyst. 



ovum ; ovary. 



papilla. 



perradial. 



perradial canal. 



radial canal. 



rhopalium. 



rhopaliar canal. 



rhopaliar lobes. 



sensory pit. 



septum. 



stomach. 



perradial ridge of stomach. 



sub-umbrella. 



tentacle. 



tseniola. 



tentacular canal. 



tentacular lobe. 



umbrella wall. 



velum. 



PLATE I. 



FIG. 1. Gatallema weldoni. Early stage, x 10. 

 FIG. 2. Catablema weldoni. Adult. X 3J. 



FIG. 3. Catablema weldoni. The basal portion of a tentacle. Lateral view. X 12. I., basal bulb ; 

 cc., circular canal ; dc., diverticulum ; ex., exumbrella ; mb., marginal bulb ; r., radial canal. 



FIG. 4. Catablema weldoni. The filaments upon a tentacle. Lateral view. X -"> 



FIG. 5. Catablema weldoni. Lower portion of the stomach, showing the gonads (g.~), and the mouth (m.) 

 with perradial lip (per.), x 20. 



FIG. C. Cosmetirella simplex. Adult. Lateral view, x 7. 



FIG. 7. Cosmetirella simplex. A portion of the margin of the umbrella, showing a sensory pit (s.p.~) and 

 two tentacles. X 60. 



FiQ. 8. Cosmetirella simplex. Transverse section of a sensory pit. X 480. cc., circular canal ; 

 ot., otocyst ; v., velum. 



