﻿April, 1857.] 



ELLIOTT SOCIETY. 



219 



Fig. 3 to 8. — Corynitis Agassizii. 



Fig. 3. — Adult — c, terminal bulb of the tentaculum. 



k, pad of thread-cells. 

 Fig. 4. — View of another quadri-tentaculate specimen from above ; c, as in fig. 3 

 Fig. 5. — Bi-tentaculate, free stage. 



* natural size; letters as in fig. 3. 



Fig. 6. — Bi-tentaculate bud before separation from the larva, much magnified. 



a, single large cavity of the tentaculum. 



c, radiate tube. 



d, digestive trunk. 



Fig. 7 to 3. — Two positions of a still younger bud, in which the two large ten- 

 tacula are just beginning to sprout ; a, c and d, as in fig. G. 



b, sinus of the radiate and circular tubes, at one of the points whence 

 the two additional tentacula are to spring. 



Fig. 9 to 11. — Willsia ornata. 

 Fig. 9. — Magnified view. 



* natural size. 



Fig. 10. — Chain of thread-cells which rises from the margin along the outer sur 

 face. 



a, terminal group of a chain. 



b, group which has resulted from the union of two or more smaller 

 groups by contraction. 



Fig. 11. — Small portion of the border of the labial circle magnified. 

 a, one of the larger thread-cells. 



plate 10. 



Fig. 1 to 7. — Neviopsis Gibbesii. 



Fig. 1. — Adult magnified, with (s) fully developed sexual organs. Magnified 

 Drawn from nature, by H. Bosse. 

 c, one of the pair of clavate tentacula. 

 Fig. 2. — Somewhat younger specimen with (s) less developed sexual organ. 



Drawn from nature, by H. Bosse. 

 Fig. a. — 1, enlarged view of the compound tentacular bulb, showing the ocelli 



at the bases of the clavate tentacula. 

 Fig. 3. — Still younger specimen with (s) sexual organs confined to the neighbor- 

 hood of the digestive trunk. Drawn by H. Bosse from nature. 

 Fig. 4. — Young medusa just after separation from the larva, s, mass representing 



the digestive trunk, and future sexual organs. 

 Fig. 5. — Bud just before separation, a one of the four compound tentacular bulbs 

 with tentacula. 



Fig. 6. — Still younger bud; a as in fig. 5. No tentacula have yet appeared. 

 Fig. 7. — Free floating larva with buds b, b. 



s, slight depression in the rudimentary stem, giving it the appearance of 

 a sucker. 



u, tentacula of the upper circle. 



I, tentacula of the lower circle. 



m, the mouth. 



