70 Bulletin, VonderbUt Marine Museum, Vol. IV 



Distribution : Littoral. Confined to the Mediterranean Sea. 



Host of the following animals : Copepod, Collocheres gracilicauda 

 (Brady) ; Annelida Polyehaeta, Myzostomum cirriferum von Graff; 

 M. bucchichii Yon Wagner ; and M. parasitium Leuckart. 



Material examined: One specimen, dredged in 65 fms., 11 miles 

 N. W. of Lissa Island, Dalmatia, Adriatic Sea. Ten specimens, 

 dredged in 100 fms., 9y 2 miles E. by S., y 2 S. of Cape Bon Tunis, 

 North Africa, by the "Am." 



Color: According to Dr. A. H. Clark, the majority of this species 

 are red, while others are purple-red, or red of various hues spotted 

 with lighter shades, yellow, sulphur-yellow or sulphur-yellow banded 

 with white. The " Ara" specimens were all of the sulphur-yellow 

 tones. 



Development: See Dr. Oswald Seeliger's memoir, 1892. 



The eggs are encased in a tough membrane and are attached to the 

 pinnules of the parent. The eggs have a comparatively large yolk. 

 Infrabasals are developed at a little over four days' age; these are 

 usualty four to five, more rarely three in number. The known spawn- 

 ing time is the month of May. The eggs are opaque whitish yellowish 

 or light red. 



Discussion: This very beautiful Crinoid, which was recorded by 

 Olivi as long ago as 1792, was only established as a distinct species in 

 1910, when Dr. Austin H. Clark set it apart from Antedon mediter- 

 ranea. Dr. Clark's thorough description of A. adriatica and his subse- 

 quent monographic analysis of it make further notes superfluous. 



A. adriatica and A. mediterranea both have very long slender arms, 

 cirri and cirrals, especially adriatica, and the two species closely 

 resemble each other, but are distinguished by the differences in the 

 length and in the proportions and the numbers of joints in the arms 

 and cirri. 



References : Antedon adriatica A. H. Clark, Proc. U. S. Nat. Mus., 

 vol. 38, no. 1749, p. 331, June, 1910 ; Mon. Existing Crinoids, vol. 

 I, pt. 1, Bull. 82, U. S. Nat. Mus., pp. 21, 43, 56, 60, 123, 132, 171, 

 300, 315, 316, fig. 1, fig. 106, 1915 ; ibid, pt. 2, pp. 52, 53, 73, 95, 

 119, 132, 150, 225, 265, 278, 291, 330, 349, 367, 373, 374, 410, 431, 

 433, 500, 502, 503, 509, 527, 578, 579, 580, 581, 583, 584, 585, 588, 

 589, 590, 595, 608, 610, 611, 635, 648, 654, 655, 657, 660, 663, 669, 

 684, 697, 723, 729, 730, 731, 732, 733, 735, 736, 747, 752, 755, fig. 

 80, fig. 757, 1921 ; ibid, pt. 3, pp. 43, 56, 1931. 



