32 MUSEUM, BEOOKLYN INSTITUTE OF ARTS AND SCIENCES. 
Fig. 
16 
« 
17 
cc 
18 
(< 
19 
« 
20 
a 
21 
a 
22 
a 
23 
u 
24 
i< 
25 
11 
26 
a 
27. 
Fig. 
28 
(C 
29 
(I 
30 
<i 
31 
li 
32 
ii 
33 
i( 
34 
a 
35 
EpentJiesis folleata. 16a. 
Eucheilota paradoxica. 
PLATE III. 
Side view of manubrium. 
Young medusa. 
Medusa-bud about to be set free. 
Ohelia sp. 
" tentacle and otocyst. 
Tiaropsis punctata. 
Parvanemus degeneratus, gen. et 
sp. nov. 
Oceania McCradyi. 
Mature medusa. 
A medusa-bud 
blastostyles. 
from one of the hydroid 
Phortis pyramidalis. 
Zygodnctyla cyanea. 
Aegina rliodina, 28a. 
Laodicea ulothrix. 
Liriope scutigera. 
Tetracannota collapsa. 
Glossocodon tenuirostris. 
Aglaura liemistuma. 
Cladonema PerJcinsii. 
Portion of bell margin. 
PLATE IV. 
Otocyst. 
Tentacle. 
Mature medusa. 
Young medusa. 
Mature medusa. 
Copied by permission from a drawing by 
Professor H. F. Perkins, in Johns Hop- 
kins University Circulars, Vol. XXI, No. 
155. 
36 
37 
42 
Fig. 43. 
44. 
45. 
46. 
47. 
48. 
49. 
50. 
51. 
52. 
Budding stolon of Cunoctantha. 
•41. Successive stages in the devel- 
opment of medusa-huds on 
the stolon of Cunoctantha 
shown in Fig. 36. 
Marginal sense organ of the 
medusa of Cunoctantha 
when about to he set free. 
PLATE 
Cuhaia aphrodite. 
V. 
Olindias tenuis. 
Young medusa. 
Half-grown medusa. 
Full-grown medusa. 
Manubrium of Fig. 45. 
Otocyst. 
One of the velar tentacles. 
One of the sucker-bearing tentacles. 
Young medusa. 
Older than Fig. 50. 
Half-grown medusa. 
