30 MUSEUM, BROOKLYN INSTITUTE OF ARTS AND SCIENCES. 
Nausithoe-punctata, Kolliker. 
KoLLiKRR A., 18j3; Zait. filr Wissen. Zool.. BJ. TV, p 3-33. 
Nausithoe albida, Carus, V., 1857 ; fcones Zootom. Taf. 11, Figj. 17, 22, 23, var. pacifica Aoas 
siz, A. and Mayer, A. G., 1902; Mem. Mas. Comp Z xil., Vol. XXVI, p. 155 PI. 7, Fig. 32. 
This medusa is abundant in the Baliamas, Tortugas and Mediterranean 
during the summer months, and a closely allied variety is found in the Trop- 
ical Pacific. 
Linerges mercurius, Haeckel. 
Haeckel, E., 1880 ; Syst. der Mednsen, p. 495, Taf. XXIX, Fig. 4-6. 
The young ephyrae of this medusa appear in vast numbers in the Bahamas 
in March and grow rapidly to maturity, disappearing before the fi^rst of June. 
A closely allied species, Linerges aquila, is common in November and Decem- 
ber in many of the lagoons of Atolls in the Tropical Pacific. 
Aurelia habanensis, Mayer. 
Mayer, A. G., 1900, Bull. Mus. Comp. Zool at Harvard Coll., Vol. XXXVII, p. 69, Figs. 73. 
74, PI. 24 ; Fig. 86, PI. 26. 
The ephyra? of this species appear in considerable numbers in June and 
July, and mature individuals are abundant in August. Mature specimens are 
also found in Havana harbor in February. 
Cassiopea frondosa, Lamarck. 
Lamarck, J. de., 1817 ; Hist. anim. sans vert., Tom. II, p. 512. 
Medusa frondosa, Pallas, P. S., 1774 ; Spicilegia Zool. Fasc. X, p. 29, 30 ; PI. 2, Fig. 1-3. 
Cassiopea frondosa, Tilesiiis, W. G. , 1834 ; Beitrage ziir Nat. der Mednsen, Acad. Caee. 
Leop. Nova Acta, Tom. XV, p. 263, 278 ; Tab. LXXIT. Figs. 15. 
Polyclonia frondosa, Aqassiz. L.. I860; Cont. Nat. Hist. U. S., Vol. Ill, Pis. 13, 13a. 
This medusa is locally abundant in spring and summer. It prefers 
muddy bottoms where the water is not very pure and often remains motion- 
less for long periods of time with its disk pressed against the ground, its 
oral side and mouth arms being uppermost. 
It is abundant in June and July in the moat of Fort Jefferson, Dry Tor- 
tugas, Florida. 
Siphonophorae. 
The Siphonophorae of the Bahamas are s])(m ies common also to the 
Tropical Atlantic. They are more abundant at the surface in winter than 
in summer, when they pro])ably sink to a considerable depth. 
Ctenophorae. 
Bolina vitria is abundant over the shallow banks in summer, while 
Beroe Clarkii is found commonly in the spring. 
