;50 MISIMM. I'.l.'OOKLYN INSTITUTE OF ARTS AND SCIENCES. 

 Nausithoe-punctata, Kuluker. 



K6Lr,iitRR A, lS-)3; ZM. file Wissen. ZoJl. BJ. IV, p 323. 



Nausithoe albida, Carus. V., 1857 ; fcones Zootom. Taf. II, Fig. 17, 22, 23, var. pacifica AoAS- 

 siz. A and Mayru, A O , 1903; Mem Mas. Comp Z .;)1., Vol. XXVI, p. IS.-i PI. 7, Fig. 33. 



Tliis uH'diisii is abundant in the Balianias, Tortunas and Jlediterranean 

 during the summer months, and a closely allied variety is found in tbe Trop- 

 ical Pacific. 



Linerges mereurius, Haeckel. 



Hakokei., E., 1880 ; Syst. der Mednsen, p. 49.'->, Taf. XXIX, Fig. 4-6. 



The youni;' epliyra* of this medusa ap])ear in vast lunnbers in the Bahamas 

 in March and jjrow rapidly to maturity, disaitjieaT-inii; before the first of June. 

 A closely allied species, Linerctes aquila, is common in November and Decem- 

 ber in many of the lagoons of Atolls in the Tropical Pacific. 



Aurelia habanensis, Mater. 



Mayeb, a. G., 1900, Bnll. 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, ,1. de., 1817 ; Hist. anim. saus vert., Tom. II, p. .513. 



Medusa frondosa, Pali. as, P. S., 1774; Spicilegia Zool. FaBC. X, p. 29, 30; PI. 2, Fig. 1-3. 

 Cassiopea frondosa, Tilesius, W. G. , 1834 ; Beitrage zur Nat. der Mednsen, Acad. Cies. 

 Leop. Nova Acta, Tom. XV. p. 263, 278; Tab. LXXII, Figs. 1-5. 



Polyolonia frondosa, Agassiz. L. 1860; 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 jiure 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 F(»rt Jefferson, Dry Tor- 



tugas, Florida. 



Siphonophorae. 



The Ki])honoi>hora? of the Bahamas are sjtecies common also to the 



Tropical Atlantic. They are more abundant at the surface in winter than 



in summer, when they probably sink to a considerable depth. 



Ctenophorse. 

 Bolina vitria is abundant over the shallow banks in summer, while 

 Beroe Clarkii is found commonly in the spring. 



