148 Papers from the Marine Biological Laboratory at Tortugas. 
AGLAURA CILIATA,! New Species. 
(Plate 3, figs. 14-16.) 
Specific characters.—A glaura with bell, provided with a prominence at the 
top; gastric pouches at upper extremity of manubrium; four pendulous oral 
lappets bearing nettling organs and lined with strong cilia. Velum not 
strongly developed; tentacles, 24 in number, short and not vigorous; litho- 
cysts, 8 in number, placed midway between the marginal endings of the 
radial canals. Four small masses of glandular tissue hang down from the 
walls of the manubrium, above the middle, into the lumen of that organ. 
Eight similar masses hang from the radial canals, one from each canal, into 
the space within the bell. Color, steely blue, uniform throughout. 
Habitat—Open sea around the Tortugas Islands, Florida. Taken in tow- 
net near ship-channel by Dr. W. K. Brooks, July, 1905. The specimens 
were amongst a quantity of material taken in the tow, and very kindly 
given to the writer for examination. This opportunity is taken to acknowl- 
edge my gratitude to Dr. Brooks for this and very many other favors. His 
helpful suggestions were keenly appreciated. 
The occurrence of the peculiar knotted masses of tissue in the two dif- 
ferent parts of this medusa, on the radial canals and within the manubrium, 
with every indication of being glandular rather than gonadial tissue, is of 
considerable interest. It would not be strange if either or both of these 
two groups of protuberances had sometimes been mistaken for gonads. 
Again, the slender pendulous pouches upon the manubrium have undoubtedly 
been called by that name. On the placing of these organs a distinction has 
been made between medusze, which were therefore concluded to constitute 
separate genera. Thus, Haeckel? has separated Agiawra and Agalma partly 
on account of the presence of eight gonads in the latter, located on the radial 
canals. Aglantha is another genus which is distinguished principally on the 
basis of this character. The species under discussion partakes of the charac- 
ters of both Agalma and A glantha. 
A comparison between the old species Aglaura hemistoma Péron*® and 
A. ciliata shows that the differences group themselves as follows: 
Aglaura hemostoma.—Height not greater than breadth. Lips not provided with 
nematocysts (?). Gastric pouches (“ Geschlechtsorgane,” Leukart;* ‘ Tentakeln,” 
Eydoux u. Souleyet®) not higher than the middle of manubrium. No glandular pro- 
tuberances on radial canals or interior of manubrium. 
Aglaura ciliata new species—Bell not parallel-sided, higher than broad. More 
decided apical protuberance than in A. hemistoma. Lips strongly ciliated and set 
with clusters of nematocysts. Gastric pouches near the upper end of the manubrium. 
Glandular protuberances projecting from inner walls of manubrium, and pendant from 
radial canals, near their origin. 
*Derivation: ciliatus, having cilia. From the character of the inside of the 
manubrium. 
? Haeckel, E. 1880. System. 
*Péron. Annales du Museum, t. xiv. 
*Leukart, Rud. 1856. Archiv fiir Naturgeschichte. 
*Eydoux u. Souleyet. Voyage de la Bonite. Zool. Zoophyt., Pt. I. 
