WEST INDIAN STAEFISHES 203 



of ambulacral feet orange-red. According to Clark (1898), the 

 color of one at Jamaica was dark olive-green or purplish above, 

 with irregular yellowish bands across the rays; beneath yellow. 

 Some specimens have the spines banded with lighter and darker 

 colors. 



LuiDiA ALTERNATA BicoLOR, variety nov. 



Plate xii ; figures 1-lc. Details. 



The dorsal area is pretty evenly covered with small spinopax- 



illffi having a small acute central spine, surrounded by a circle 



of about nine to twelve short clavate spinules. The spinopaxillae 



are in pretty regular neariy equal longitudinal rows of twelve 



to fourteen or more. 



The marginal plates bear three long, slender, acute, terete, bi- 

 colored spines, chocolate-brown on the basal half and pale or 



white distally. 



The longer spines are about three times as long as the ad- 

 jacent plates. The lower spine is considerably smaller and 

 shorter than the two upper ones. It arises from near the adam- 

 bulacral plates, and is sometimes lacking. The large spines are 

 all surrounded at the base by a group of slender, very acute, 



small spines. 



The adambulacral plates bear two slender, acute spines, one 

 behind the other. The inner one is smaller, shorter, and curved 

 outward. These are also surrounded at their bases by a number 

 of small and very slender spines. 



This was taken by the Bahama Expedition, off Key West, Fla., 

 at station 39, in 20 fathoms (one large), and at station 24, in 60 

 fathoms (young). I have also seen it in the Albatross collec- 

 tions. 



LuiDiA ELEGANS Pcrricr. 



Luidia elegans Perrier, Arch. Zool. Exper., vol. v, p. 256, 1876; EtoHes de 

 Mer p. 269, 1884. Verrill, Amer. Journal Sci., vol. xx, p. 403, 1S8U , 

 ditto, vol. xlix, p. 134, 1895; Expl. by Albatross in 1883, p. 543, pi. 

 xiii, figs. 39, 39a (distribution). 



Plate xvi; figures 4, 4a. Details. Plate xix; figure 1. Young. 

 This species, as taken by us, grows to more than 350-- m di- 

 ameter. Color, in life, deep orange above, lighter below. 



