E. W. BERGER ON THE CUBOMEDUS>E. 83 



Fig. 15. This figure is a drawing of a portion of a transverse section of one of 

 the simple eyes. Note the flagella from the retinal cells, pp. 62. 



Fig. 16. The section of the lower left hand corner of this figure is through a por- 

 tion of one of the proximal complex eyes, and shows the centrad continuation of the 

 axial nerve fibers of the retinal cells. The section is such, that, besides the simple 

 eye, the nuclei of the proximal complex eye (upper part of figure) and two network 

 cells are cut. X920. pp. 47, 62, 63. 



Fig. 17. A transverse section through the tips of the ampulla cells is here shown. 

 To the left is towards the upper end of the ampulla. The basal bodies with the cen- 

 trad fibers are in the plane of the section, while the flagella are supposed to extend 

 below the plane of the section. XI 350. pp. 71. 



Fig. 18. These bodies, from within the ampulla cells, contain some of the secre- 

 tion of the ampulla cells, and resemble the " floating bodies." X1350. pp. 72. 



Fig. 19. The " floating bodies " here represented are from the ampulla. Globules 

 of a secretion similar to that found in the ampulla cells are seen both within and 

 without the bodies. Note also the two black bodies without the cells and two or 

 three similar ones within the cells. These latter bodies are of doubtful nature. 

 X1320. pp.72. 



Fig. 20. This figure represents sections of the various nuclei found within the 

 ampulla cells. X1350. pp.69, 70. 



Fig. 21. These cells are from the same preparation as Fig. G. They are 

 evidently retinal cells from the simple eyes. The tendency of their pigmented 

 ends to become globular, I believe, is due to their having become isolated before 

 they hardened during maceration. X920. pp. 62. 



Fig. 22. This diagram illustrates the retraction of the long pigment cells. 

 The dotted lines in the vitreous body mark the outlines of the prisms, while 

 the continuous lines represent the axial fibers of the prism and pyramid cells- 

 pp. 45, 46, 48, 49, 53. 



Fig. 23. These cells are from the epithelium of a sensory club. They are 

 from the same preparation as Fig. 6. Flagella are not shown. X900. pp. 64. 



Fig. 24. This group of epithelial cells of a club are from the same prepara- 

 tion as Fig. 6. X850. p. 64. 



Fig. 25. This sketch is a transverse section through the tips of the epithe- 

 lial cells of a club. The polygonal areas are the cells, while the central dots 

 are the centrad continuations (nerve fibers) of the flagella of the cells. X920. 

 pp. 63, 65, 66. 



Fig. 26. The flagella of the epithelium of a club are in this figure seen to extend 

 centrad, some beyond the nuclei. Cell outlines are not shown. X920. pp. 64, 65, 66. 

 Fig. 27. The cells of the lower half of this figure belong to the ampulla, those of 

 the upper half to the canal of the peduncle. The right side of the figure is towards the 

 eyes (the ventral side) of the club. Globules of secretion are seen within the 

 ampulla cells, as also a globule without. The ring above the latter globule is 

 probably an empty shell of a floating cell. X1320. pp. 68, 69, 71, 73. 



Fig. 28. This figure is from a transverse section of a tentacle of Charybdea. 



