32 Bulletin, Vanderbilt Marine Museum, Vol. IV 



References: Madrepora rosea Pallas, Elench. Zooph., etc., p. 312, 

 1766. 



Stylaster roseus H. Milne Edwards and Haime, Hist. Nat. Corall. 

 t. II, p. 130, 1857 (with early synonymy). — Pourtales, as 

 footnote, Bull. Mus. Comp. Zool., vol. I, art. 7, p. 136, 1868.— 

 Verrill, ibid, vol. I, art. 3, p. 45. — Hickson and England, Sty- 

 lasterina Siboga Exped., vol. VIII, p. 8, 1905. 



Stylaster sanguineus Valentin, Mem. Mus. Comp. Zool., vol. II, p. 83, 

 1871. 



Family: OLINDIAIDAE. 



Genus : OLINDIAS F. Muller 

 Olindias tenuis (Fewkes). 



Plate 4. 



Type : Collected at Key West, Florida, 1878, by Alexander Agassiz ; 

 deposited in the Museum of Comparative Zoology, Cambridge, Mass. 



Distribution : Found abundantly on the muddy flats of the Florida 

 coast, Bahamas and Bermudas. An abundant species in summer. 

 Mayer (1910) suggests that tenuis may be only a small northern 

 variety of 0. sambaquiensis, which occurs abundantly along the Bra- 

 zilian coast. 



Material examined: One specimen, collected at Turtle Harbor, 

 Florida, November 28, 1923, by the "Ara." 



Color: Bell delicate translucent greenish yellow. Ectoderm of 

 manubrium, gonads and tentacle bulbs is an opaque yellow green with 

 the innermost parts purple-red. On the manubrium near the base of 

 the origin of the four radial canals there are four interradial purple 

 red spots. The nematocyst warts on the short exumbrella tentacles 

 are either white or deep purple, while the half-rings on the long 

 flexible marginal tentacles are red and yellow. (Mayer.) 



Life history: Mayer (1910) describes several growth stages of this 

 species. 



Technical description : Consult Bigelow, Mem. Mus. Comp. Zool., 

 vol. 37, p. 109, 1909, and Mayer, Medusae of the World, vol. II, p. 354, 

 pi. 47, figs. 8-10, pi. 48, figs. 1-7, 1910. 



The "Ara" specimen is 25 mm. diameter and has 34 primary tenta- 

 cles ; 52 secondary tentacles. 



The bell is hemispherical, the gelatinous substance quite firm; the 

 velar, short tentacles each arising from the bell in a line a little above 



