Notes on Meduse of the Western Atlantic. 147 
which is so characteristic of the genus, and flaring also at the distal end 
into a trumpet-shaped closure for the capsule. 
Only two of the hydroids that were seen showed anything of value as to 
the reproductive process. In these, two medusa buds were developing upon 
the blastostyle within the gonotheca. Both were more than half-way out on 
the blastostyle, and behind the smaller, more proximally situated bud there 
was no sign of more progeny ready to begin growth. 
The bud farther from the base of the capsule was about twice as far along 
in the matter of size and development as was the younger individual. It 
was my misfortune to be unable to find specimens in later stages of growth 
than that of the older bud represented in the figure. No free medusze were 
taken in the tow-net, which was plied patiently in the waters of the moat, 
so that the specific characters of the mature jelly-fish can not be described 
at this time. 
There were, in the specimens observed, four radial canals fully developed, 
each one ending in a large cushion of ectodermal tissue, evidently the basal 
enlargement, possibly sensory in function, which the tentacles of Campanu- 
larian medusz always carry at the point of emergence from the bell-margin. 
The nearly spherical shape of the medusa buds should be mentioned as 
a point in contrast with the very long buds which are found in the capsules 
of some of the Campanularide. 
Comparison of characters of Campanularia macrotheca with those of other species 
nearly related to it. 
| Species Height. | Hydrotheca Annulations on | Annulations on | 
; margin. | hydranth stem. | gonotheca stem. 
= —| : as es} ep SEEY 
| Inch. . 
Campanularia raridentatal. ...| 0.05 Serrated......... aera Be nas | \ None 
| 5 or 6 proximally 
| Platypyxis cylindrica”........... | 0.125 Crenelated...... 2 or 3 distally....| 2 or 3 
| Campanularia macrotheca...... 0.062 | Crenelated...... USD eee | None 
7 distally ......... 
Habitat.—The specimens here described were all found in the moat of 
Fort Jefferson, Tortugas Islands, Florida. The stolons were found creep- 
ing upon the same filamentous alga upon which the hydroids of Cladonema 
were growing. 
The above species differ in the matter of habitat as well as in morpho- 
logical characters. The habitat of C. raridentata is given by Hincks as 
“other zoophytes and on corallines, between tide marks.” The two other 
species given in the table have the same habitat. 
* Alder, J. A catalogue of the Zoophytes of Northumberland and Durham. Trans. 
Tynes. Nat. F. Club, 1857. 
* Agassiz, A. 1862. Contrib. Nat. Hist. U. S. 
