254 Verrill, Notes on Radiata. 



which are either entire or but little broken, — rarely into more than 

 three pieces, which do not disturb the regular arrangement of the 

 plates ; by the radial shields, which are naked in this species and nearly 

 always covered in the preceding.* The arm-spines in this species, near 

 the base of arms, are usually eleven in well grown specimens ; in 0. 

 teres of corresponding size nine, and in the largest but ten. There are, 

 usually, one or two more mouth papillae in the present species. The 

 mouth-shields of 0. teres are very broad and short, with a nearly 

 straight outer edge, concave sides, and a rounded lobe projecting in- 

 ward ; in this species they are oval, about as long as broad, very convex 

 outwardly, with a slight, rounded angle inwardly. The under arm- 

 plates are relatively wider than in 0. teres and somewhat different in 

 form. In the latter the narrow space between the upper genital slits 

 and the arms is covered with granulations like the disk ; in 0. Pcina- 

 mensis it is occupied by narrow naked scales, without granulations. 



Ophiura variegata (Liitken) Lyman, op. cit., p. 10 (no description). 



Ophioderma variegata Liitken, Vidensk. Meddelelser, March, 1856; Addit. hist. Oph., 

 p. 97. 



A much smaller number of this species than of the last was collected 

 by Mr. Bradley at Panama. Dr. Liitken's specimens were from Realejo. 



It may be distinguished from the preceding by its covered radial 

 shields, naked side mouth-shields, and oval mouth-shields not so broad 

 as in the last. Upper arm-plates undivided, arms depressed and more 

 slender. It is closely allied to 0. brevispina of the West Indies. 

 Length of arms 3 inches; diameter of disk -7 of an inch. 



The color above is olive-green or greenish brown, with a central 

 blotch and other irregular blotches of reddish scattered on the disk, or 

 sometimes only five, corresponding to the interradial spaces. The 

 arms are conspicuously banded with lighter and darker. The whole 

 lower surface is reddish white. 



Ophiura Daniana Verriii, sp. nov. 



A depressed species, with short, tapering arms, and partially covered 

 radial-shields. Upper genital openings visible from above, with ele- 

 vated borders. Side mouth-shields naked. Under arm-plates broad 

 and strongly concave outwardly. Arms speckled above with dark 

 brown, and having a row of distant, circular spots of yellowish-white ; 

 beneath white. 



Diameter of disk -55 of an inch; arms 2 inches long; -15 wide at 

 base. Mouth-papilloe ten or eleven on each side of the mouth-slits ; 



* Mr. Lyman describes the young as having naked radial shields. Our specimens, 

 both large and small, have them covered. 



