56 NATURAL HISTORY BULLETIN 



sides and rounded angles, and imbricated by the two distal lobes 

 of each, overlapping the edge of the two plates beyond it. Thus 

 each plate joins four others. 



Each dorsal plate has a round central boss, carrying a fascicle 

 of ten to twelve long (about 1°^™), slender, movable, webbed 

 spinules capable of becoming either divergent or fasciculate. 

 Two large isolated papular pores are situated on the adoral side 

 of each plate in the notches. 



The adambulacral plates are short, but elongated transversely. 

 Each has a single small furrow-spine, and on its actinal side 

 three large flat, striated spines, truncated and fringed at the tip, 

 ■each of which seems to be composed of three united slender 

 spines. These form three longitudinal rows. 



Outside of the adambulacrals is a range of imbricated plates, 

 corresponding to them in length, but a little oblique. Each of 

 these bears a flat fascicle of coalesced spinules like those of the 

 adambulacral plates. These are succeeded by an outer row of 

 similar, but less regular, plates which form the margin of the 

 under side. 



Each jaw-plate bears a large, flat, lanceolate, hyaline spine, 

 turned outward and appressed. Other oral spines are small and 

 webbed together. 



Ambulacral feet are rather large, in two regular rows, with 

 well developed suckers. 



The type was taken by the Blake off Barbados, in 163 or 200 

 fathoms, with three others ; a young one was taken near the same 

 place in 76 fathoms. It was also dredged in the West Indies by 

 the Albatross. 



Taken by the Bahama Expedition at station 56, on the Pour- 

 tales Plateau, N. lat. 20° 16', in 200 fathoms (3 specimens). 



Family Asterinid^. 



Asterinidw (pars) Gray, Ann. and Mag. N. Hist., vi, p. 238, 1840; Synopsis, 

 p. 15, 1866. Perrier, Eevis. StelL, iv, p. 291, 1875; v, p. 209, 1876. 

 Viguier, Squellette des Stell., Arch. Zool. Exper., vii, p. 205, pi. xiv, figs. 

 1-13, 1878 (structure). Sladen, Voy. Challenger, xxx, p. 374, 1889. 

 Perrier, Expl. Trav. et Talism., pp. 141, 163, 1894. Fisher, op. cit., 

 1911, p. 253 (Table of genera). Verrill, Revision Asterininas, Amer. 

 Journal Science, vol. xxxv, p. 477, 1913 (Table of genera) ; Starfishes 

 North Pacific Coast,, p. 262, 1914a. 



