22 THE CRASPEDOTE MEDUSA OLINDIAS AND SOME OF ITS NATURAL ALLIES: 



EXPLANATION OF PLATES I-III. 

 ABBREVIATIONS. 



can. crc. Circular canal. 



ec'drm. Ectoderm. 



eridrm. Endoderm. 



gl. muc. Adhesive mucous gland. 



go. Gonads. 



ot'cys'. Otocyst. 



rx. ta. Endodermal tentacle roots. 



ta. ex'ubr. Exumbrellar tentacle. 



ta. vel. Velar tentacle. 



PLATE I. 



OLINDIOIDES FORMOSA. 



Fig. 1. Adult medusa in natural colors ; diameter 55 mm. 



Fig. 2. Young medusa in natural colors; diameter 15 mm. at mouth of umbrella. 



Fig. 3. Portion of umbrella margin; diameter of umbrella 30 mm. Exumbrellar view; X 27 diameters. 



Fig. 4. Portion of umbrella margin; diameter of umbrella about 100 mm. Exumbrellar view; X 13 diameters. 



Fig. 5. One sextant with manubrium; diameter of umbrella 15 mm. Subumbrellar view. 



Fig. 6. One sextant with manubrium; diameter of umbrella 75 mm. Subumbrellar view. 



Fig. 7. Apical view of radial canals; diameter of umbrella 10 mm. 



Fig. 8. Apical view of radial canals ; diameter of umbrella 15mm. 



Fig. 9. Portion of gonad, showing three lobes which are subdivided into lobules; diameter of umbrella 90 mm. 



PLATE II. 



GONIONEMA DEPRESSUM. 



Fig. 10. Adult medusa in natural colors; diameter 18 mm. 



Fig. 11. Portion of tentacle, showing the adhesive gland disk. X54 diameters. 



Fig. 12. Portion of umbrella margin including a radial canal; diameter of umbrella 18 mm. X13 diameters. 



Fig. 13. Radial canal with gonad and manubrium; nearly adult. 



OLINDIOIDES FORMOSA. 



Fig. 14. Terminal portion of a longitudinal section of tentacle, showing the adhesive glandular patch; diameter of 



umbrella 60 mm. X54 diameters. 

 Fig. 15. Portion of a radial section of umbrella margin, showing the first traces of otocyst; diameter of 



umbrella 10 mm. X570 diameters. 

 Fig. 16. Portion of a radial section of umbrella margin; diameter of umbrella 10 mm. X420 diameters. 



PLATE III. 



OLINDIOIDES FORMOSA. 



Fig. 17. Portion of a horizontal section of umbrella margin; diameter of umbrella 10 mm. X 420 diameters. On 



one side of the tentacle root the otocyst is just cut tangentially. 

 Fig. 18. Portion of a radial section of umbrella margin. X420 diameters. 

 Fig. 19. Otocyst in a later stage of development. X420 diameters. 

 Fig. 20. Portion of adhesive glandular patch; diameter of umbrella 10 mm. 



seen as exudations at the free ends of the cells. 



GONIONEMA DEPRESSTJM. 



Fig. 21. Portion of a longitudinal section of tentacle, showing the adhesive disk. X24Q diameters. 

 Fig. 22. Otocyst fully developed ; diameter of umbrella 18 mm. X 420 diameters. 



X730 diameters. The mucus is 



