200 Papers from the Department of Marine Biology. 
Cytzis atlantica (Steenstrup). 
(Plate 1, Fig. 2.) 
A single specimen of an immature Cyteis was found at the Murray Islands, 
Torres Straits, Australia, on September 27, 1913. There were 8 simple oral 
tentacles and the manubrium was mounted upon a small peduncle, this being 
an indication of immaturity. The bell was half-egg-shaped, 3.5 mm. high 
with thin walls. 4 perradial marginal tentacles, each about two-thirds as 
long as the bell-diameter, and with large swollen basal bulbs, each with an 
abaxial ectodermal ocellus and a mass of dark brown entodermal pigment. 
The manubrium is about two-thirds as long as the depth of the bell-cavity 
and the ectoderm is brownish yellow with a deeply pigmented, brown, central 
region. The 4 radial-canals and the ring-canal are narrow and uniform in 
width. 
This form so closely approaches the typical C. atlantica of the Mediterranean 
and tropical Atlantic that I believe the two to be identical. 
Genus LAODICIA Lesson, 1843. 
Laodicia, Lesson, 1843, Hist. Zooph. Acal., p. 294. 
GENERIC CHARACTERS. 
Thaumantiade with 4 gonads upon the 4 radial-canals. Clubs and cirri 
may arise from or near the bell-margin between the tentacles. Ocelli may 
occur on the inner (centrad) sides of the tentacle bulbs. The stomach lacks 
a peduncle and has 4 simple lips. The gonads extend outward from the sides 
of the stomach along the radial-canals and in mature meduse they nearly 
touch the ring-canal. The hydroid is Cuspidella Hincks. 
Laodicia fijiana A. Agassiz and Mayer. 
Laodicea fijiana, AGassiz, A., and Mayer, 1899, Bull. Museum Comp. Zool. at Harvard College, 
vol. 32, p. 163. plate 3, figs. 9, 10. 
The common Atlantic and Mediterranean Laodicea is L. cruciata L. Agassiz, 
which has numerous clubs and cirri between the tentacles. In the tropical 
Pacific this form is apparently replaced by the closely allied L. fijiana A. 
Agassiz and Mayer, which has very few clubs and wholly lacks cirri between the 
tentacles. Only about half of the tentacles in the Pacific form have ocelli, 
whereas in the Atlantic variety the majority of the tentacle bulbs bear ocelli. 
Thus at Maér Island, Torres Straits, Australia, in a medusa with 120 
tentacles, only 46 bore ocelli; another had 196 tentacles, only 56 of which bore 
ocelli. In other specimens, however, nearly three-fourths of the tentacles 
bore ocelli, in this respect resembling the Atlantic form. 
This medusa was quite common off Maér Island, Great Barrier Reef of 
Queensland, in September and October. Specimens were found ranging up to 
10 mm. in diameter, and in color they were milky, green, or violet as in L. 
cruciata of the Atlantic. 
Genus PHIALIDIUM Leuckart, 1856. 
Phialidiwm, LeucKart, 1856 Archiv fiir Naturgesch. Jahrg. 1, p. 18. 
GENERIC CHARACTERS. 
Eucopiide with 16 or more marginal tentacles some of which remain per- 
manently rudimentary, with closed vesicular lithocysts scattered somewhat 
irregularly among the tentacles. 4 radial-canals upon which the 4 gonads are 
placed. Manubrium without a well-developed peduncle and with 4 lips. The 
