Clark — Three Starfish and One Brittle-star from Chile. 157 



there are three or four slender well spaced spines on the lateral borders, 

 which resemble the outer furrow spines. 



The mouth plates are short, with the inner half broadly rounded, and 

 the surface tumid, bearing a few rather long spines; the furrow series 

 consists of nine graduated spines of which the inner three are at right 

 angles to, and the outer four or five parallel to, the median border. 



The color in alcohol is dull yellow. 



Type.— Cat. No. 36,945, U. S. N. M., from "Albatross" Station 2789, 

 off the coast of Chile, in 1342 fathoms. 



Family OPHIOLEPIDID.E. 

 Ophiocten squamosum, sp. nov. 



The disk is circular, thin, strongly overlapping the arm bases, 10.5 mm. 

 in diameter; the arms at the base are 1.75 mm. across. 



The radial shields are moderate in size, triangular to ovate, usually 

 triangular with the outer angle broadly rounded, not much longer than 

 the maximum (distal) breadth, which is about as great as the diameter 

 of the arm base. The inner distal portion of the radial shields is slightly 

 raised, and the inner distal angle is broadly rounded, sometimes slightly 

 produced. The radial shields of each pair are separated interiorly by a 

 squamous band with nearly parallel sides which in width is equal to 

 about half the diameter of the arm bases. 



The central portion of the disk is covered by six circular primary plates 

 situated close together and separated by rather narrow lines of small 

 rounded plates arranged in single rows; the remainder of the disk (ex- 

 cepting the radial shields) is covered by overlapping plates of very varied 

 sizes, usually scattered larger plates separated by numerous smaller plates, 

 though there is no regular arrangement. All of the plates of the disk are 

 extremely thin. 



The interbrachial areas below are covered with rather small rounded 

 overlapping scales of approximately uniform size. 



There are usually no papillfe of any sort about or on the arm bases ; 

 but occasionally from one to three small papilla? are found representing a 

 rudimentary arm comb. 



The oral shields are very low, pentagonal, nearly or quite twice as 

 broad as long, with a very obtuse proximal angle, slightly converging 

 lateral edges, and a straight distal edge. 



The side mouth shields are very narrow, at the first arm tentacle pore 

 almost entirely covered by the oral shield, the proximal lateral angles of 

 which they surround. 



The mouth papilla; are five in number; the innermost is triangular, 

 sharp pointed; the next is of about the same length, but slightly longer 

 and less pointed; the third is similar to the second, but slightly longer 

 and less pointed; the fourth is longer than the third, with a nearly or 

 quite straight outer edge ; the fifth is as long as the three preceding, very 

 narrow, with a straight distal edge. 



