ECHINODERMS OF CHALLENGER BANK, BERMUDA. 359 



VIII) shows that species to be conspicuously red. Professor Nutting 

 in his Narrative of the Bahama Expedition (1895, Bull. Univ. Iowa: 

 Nat. Hist., 3, p. 168) is enthusiastic over the beauty of the Coronasters 

 collected, but says never a word as to the color! 



OPHIUROIDEA: BRITTLE-STARS. 



Ophiomyxa flaccida. 



Ophiura flaccida Say, 1825. Jour. Acad. Nat. Sci. Philadelphia, 5, p. 151. 

 Ophiomyxa flaccida Liitken, 1859. Add. ad hist. Oph., pt. 2, p. 79. 



This common West Indian brittle-star is well known from several 

 Bermudan stations. It was taken on the Challenger Bank by the 

 Challenger in 32 fms. but was not met with by the party from the 

 Bermuda Biological Station. 



Ophiactis savignyi. 



Ophiolepis savignyi Miiller und Troschel, 1842. Sys. Ast., p. 95. 



Ophiactis savignyi Ljungman, 1867. Ofv. Kongl. Vet.-akad., Forh., 23, p. 323. 



The occurrence of this ubiquitous tropicopolitan brittle-star at the 

 Challenger Bank is cjuite natural. Indeed, it would be extraor- 

 dinary if it did not occur there. Yet its presence is indicated by 

 only a single small specimen taken in 1903. 



Ophiothrix angulata. 



Ophiura angulata Say, 1825. Jour. Acad. Nat. Sci. Philadelphia, 5, p. 145. 

 Ophiothrix angulata Ayres, 1852. Proc. Boston Soc. Nat. Hist., 4, p. 249. 



This common ^Yest Indian brittle-star, which Verrill (1900, Trans. 

 Conn. Acad., 10, p. 585) lists as "not common" at Bermuda, was taken 

 at the Challenger Bank by both the Challenger party and the 

 one from the Bermuda Station. Lyman says nothing whatever 

 as to the specimens taken bj- the Challenger, but those taken by the 

 party in 1903 represent two quite distinct varieties : 



Ophiothrix angulata var. phoinissa. 



H. L. Clark, 1918. BuU. M. C. Z.,^62, p. 317. 



A single individual of this form was taken. It is 5 mm. across 

 the disk and the uniformly deep red color is perfectly evident, though 



