THE HYDEOID MEDUSAE. 
349 
net. On calm warm days in summer and autumn — dreamy 
days are the best — a bag of fine muslin fastened to a stout ring of 
wire, and towed at the stern of the boat, will gather a rich har- 
vest of beautiful forms. The student will have a fair chance of 
obtaining some specimens in which the ova are far advanced 
towards maturity, and may possibly be fortunate enough to 
keep them until the embryos are discharged. If he can rear 
these into polypites he may complete an imperfect life-history* 
and fill up one of the many gaps in our knowledge of the tribe. 
This has been done in a few cases ; by care and patience it 
might no doubt be done in more. 
And even those who are not prepared for any profound study 
of the structure and history of the medusae may find the tow- 
net a not uninteresting resource during their visits to the sea ; 
and if they have any sensibility to beauty in their souls, can 
hardly fail to derive the highest gratification from watching the 
exquisite forms and movements, and the singular habits of 
these “ animated bubbles.” 
DESCRIPTION OF PLATE LXXXVIII. 
Fig. 1. Cremcitostoma flava , A. Agassiz. 
„ 2. A Campanuiarian medusa, not yet described (?). 
„ 3. The free sexual zooid of Lar Sabellarum , Gosse. 
„ 4. Tima formosa, Agassiz. 
5. Oceania languida, A. Agassiz (the young). Probably the gono- 
zooid of a Campanulina. 
„ 6. The same, in the adult state. 
„ 7. Cladonema radiatum, Duj ardin. The medusa in an early stage of 
its development. 
„ 8. Clavatella prolifer a, Hindis. The ambulatory zooid.' 
„ 9. Dicoryne conferta, Alder. The female natatory zooid ; an ovum, 
with its germinal vesicle and spot, is visible within the cavity 
of the body. 
„ 10. The Hydroid planida or embryo. 
[Figs. 1, 4, 5, and 6, are after Alexander Agassiz; fig. 9, after Allman ; and 
the rest from drawings by the Author.] 
