6 J.D. Dana on Zoophytes. 
with short hairs, and has an obtuse extremity. The body of c 
appeared to be filled with granulous matter; the filament is en- 
larged, as in 6, but is naked, and terminates in a very delicately 
attenuated extremity. These several forms were seen again and 
again from various individuals, and lately the researches have been 
repeated with the same results. The spermatozoa were observed 
to have motion.* — 
These cords had been considered biliary vessels by some writ- 
ers and also as ovarian, before their spermatic character was as- 
certained. Their structure is finely figured by A. de Quatre- 
fagest but without distinguishing the different kinds of spiculi- 
form bodies or apparently appreciating their nature. 
31. The clusters of ova lie in the visceral cavity, or its com- 
partments, and sometimes are found in the tentacles as detected. 
by Dalyell in frequent amputations of these organs, a fact easily 
understood since the compartments and tentacles communicate 
openly with one another. But according to the best authority, 
and observations in the Expedition by Mr. Couthouy, they leave 
the internal cavity through the stomach and mouth, sometimes as 
ova 
. 
fini animal 
as chippings from a potato to a potato-plant. And they have 
been put in boiling water without serious injury. re 
* These investigations were first published i 
,” These stig $ were published in the Report on Zoo- 
hytes by the writer. They were made on the Acheimtesiaiiden oO 
esueur, which is common in the harbor of Boston. Dr. Wyman 
