30 NATURAL HISTORY BULLETIN 



as the spine, and much larger than those of the dorsal surface. 

 Some spines have also two or more smaller ones. The larger 

 ones, on the marginal spine, are compressed, long ovate, with 

 acuminate or contracted tips; the smaller ones are acute-ovate, 

 like the dorsal ones. The largest occur on the outer dorsal 

 spines. 



The peroral and adoral spines are considerably elongated and 

 acute. The oral area is deeply concave, so as to conceal most of 

 the spines. The smaller alternate adambulacral plates are not 

 carinate and do not project into the grooves. They usually bear 

 one very small inner spine and two longer very unequal outer 

 ones. 



The ambulacral sucker-feet are large. Proximally they form 

 four rows ; farther out they are in two zigzag rows on each side ; 

 toward the end of the rays, they are reduced to two nearly 

 straight rows. 



This was taken by the Blake, at station 134, off Santa Cruz, in 

 248 fathoms, 10 specimens; and at station 157, off Montserrat, in 

 120 fathoms, one specimen. 



The specimens studied by me were mostly taken by the Al- 

 batross. The larger, described above, was from station 2396, off 

 Pensacola, Fla., in 335 fathoms, gray mud, bottom temperature 

 41.80° F. (No. 18,450, Nat. Mus.) The other was from station 

 2394, also off Pensacola, in 525 fathoms, light gray mud (No. 

 10,422). It was also taken at several other localities. 



Family Pedicellasterid^ Perrier. 



Pedicellasteridw Perrier, Etoiles de Mer., pp. 167, 194, 1884; Exped. Trav. 



et Talism., p. 92, 1894. Sladen, op. eit., p. 556, 1889. Verrill, op. 



cit., p. 202, 1914a. 

 Pedicellasteridce (pars) Perrier, op. cit., "1885, p. 15. 



Disk small, rays usually five or six, sometimes ten to twelve or 

 more, as in Coronaster. Dorsal skeleton usually reticulated, or 

 with few rows of plates. 



Ambulacral feet are in two rows, at least distally. The jaws 

 are formed by modified adambulacral plates. Pedicellariee are of 

 two kinds, much like those of Asteriidse. 



