Fig. 3 
Fig. 4 
Fig. 5 
Duo 6 
Due 7 
Fig. 8 
Fig. 9 
Fig. 10. 
Fig. 11 
Fig. 12 
Fig. 1 
Fig. 2. 
Fig. 8. 
Fig. 4 
Fig. 5. 
Fig. 6. 
Fig.. 1 
Fig. 8. 
Fig. 9 
Fig. 10 
Fig. L 
Fig. 2. 
Fig. 3 
Fig. 4. 
Fig. 5. 
Fig. 6. 
Fig. 7. 
Fig. 8. 
Fig. 9. 
Fig. 10. 
Fig. 11. 
BULLETIN OF THE 
. Upper part of tho bell of T. episcopalis. This figure shows ono of the four 
continuations of the bell cavity into the apical prolongation of the walls 
of the bell. 
. Optical section of the ovaries and bell margin of T. episcopalis. The origin 
of two long tentacles and. the three intermediate papillæ is shown on the 
lower side. 
. The tentacular bulb of 7. episcopalis. The figure shows the relative position 
of the ocellus. 
. Undeveloped tentaeular papilla of T. episcopalis. 
. Tentacular bulb and ocellus of Modecria multitentacula (lower side). 
. Modeeria multitentacula. 
. Optical section (from. aboral side) of the same. 
Tentacular bulb of M. multitentacula (right side). 
. Ocellus and. base of a tentacle of Sarsia mirabilis, 
. Cells and pigment spots of the spherical base of the tentacle of S. mirabilis. 
PLATE IV. 
. Ounina discoides, 
a. Sub-umbrella. 
b. Otocyst. 
v, Veil, 
View of C. discoides from oral side. One tentacle and ono otocyst rep- 
resented. 
Dinematella cgrosum (adult). 
c. Cavity in the apical prolongation of the bell. 
Young Turritopsis nutricol (oral view). 
Dipurena strangulata (adult). 
Pedunculated structure found on the adult oral lappets of T. nutricola. 
Young T. mutricola (side view of Fig. 4). 
Oral appendages of 7. mutricola, 
Stage in development of 7. nutricola between Figs. 7 and 10. 
Turritopsis mutricola (adult). 
PLATE V. 
Eutima gracilis (adult). 
Two rudimentary tentacles (?) with cirri, and a single ocellus, of Æ. gracilis, 
Tentacular knob of Æ. gracilis (adult). 
Mouth of E. gracilis (adult). 
Young of Zygodactyla groenlandica, 
Side view of the same. 
Eucheilota ventricularis (young). 
E. ventricularis (oral view). 
Half of E. ventricularis (adult). 
Quadrant of E. ventricularis (oral view). 
Single undeveloped tentacle of Zyyodactyla groenlandica, 
e, €. Green bodies. 
