148 BULLETIN 75, UNITED STATES NATIONAL MUSEUM. 



others; one can hardly avoid the suspicion that "3132" should read 

 "3732," which is a station in Japanese waters. The specimen from 

 Monterey Harbor is very possibly not this species, but it seems to be- 

 long here rather than with any known Californian species. 



AMPHIURA ECNOMIOTATA, new species.a 



Disk 6 mm. in diameter; arms probably about 85 mm. long. Disk 

 naked, except close to radial shields, which are unusually long and 

 narrow, and, though very close together, are in contact only near 

 outer ends. Upper arm plates extraordinarily narrow, somewhat 

 elongated oval, nearly concealed by the apparent meeting of the rows 

 of arm spines on upper side of arm; upper arm plates in contact with 

 each other, at least at base of arm. Interbrachial spaces below, 

 naked. Oral shields, long pentagonal, rounded and narrow distally, 

 longer than wide. Adoral plates nearly horizontal, w r ider without 

 than within. Oral papillae two on a side, one at apex of jaw, short 

 and thick, one near tip of adoral plate, long and spine-like; tentacle 



FIG. 59. AMPHIURA ECNOMIOTATA. x 8. a, FROM ABOVE; 6, FROM BELOW; c, SIDE VIEW OF THREE 



ARM JOINTS NEAR DISK. 



scale of first oral pore, sharp and spine-like, easily mistakable for an 

 oral papilla. Genital slits, short but wide. First under arm plate 

 very small, nearly triangular, with the base proximal; succeeding 

 plates at first oval and much longer than wide, but gradually becom- 

 ing squarish, about as wide as long, with rounded angles, and a notch 

 in the distal margin ; more or less in contact with each other through- 

 out. Side arm plates very large, though apparently not in contact 

 with each other either above or below, at least on basal part of arm; 

 each plate carries ten delicate though rather thick arm spines, the 

 lowest the longest, a little exceeding a joint; at the tip these spines 

 are very rough with minute booklets and spinelets; the arm spines 

 are so numerous, crowded, long, and rough that the arm fairly 

 bristles with them. Tentacle pores large, but tentacle scales none. 

 Color (dried from alcohol), dull yellowish-white. 



a ' EKuo/jLiorara, signifying most unusual, in reference to the combination of several 

 unusual characters. 



