24 



BULLETIN 75, UNITED STATES NATIONAL MUSEUM. 



shields about as long as wide, or sometimes longer, rather triangular, 

 with convex sides. No supplementary oral shields. Adoral plates 

 rather small, mostly free from granulation. Oral plates completely 

 concealed by a coarse granulation. Oral papillae seven or eight on a 

 side, outer ones truncate, inner pointed, penultimate decidedly largest. 

 No pores between basal under arm plates. First under arm plate 

 large, somewhat pentagonal, much wider than long; succeeding plates 

 rather hexagonal, with distal margin convex, at first wider than long, 

 but soon becoming longer than wide and near tip of arm more than 

 twice as long as wide; distinctly in contact until near tip of arm. 

 Side arm plates moderate, not meeting either above or below, until 



near tip of arm; each plate 

 carries five to seven flat, 

 pointed spines, of which 

 lowest is longest, but does 

 not quite equal joint. Ten- 

 tacle-scales two, inner, 

 larger, outer overlapping 

 base of lowest arm spine. 

 Color (dried from alcohol), 

 very variable; the type is 

 uniformly whitish; another 

 is variegated with dusky 

 whitish and dull pink or 

 reddish, the arms being dis- 

 tinctly banded ; a third has 

 arms distinctly banded and 

 lighter parts spotted with 

 purplish-red, but disk is 

 uniformly whitish. Small 

 specimens are very light, 



FIG. 1. PECTINURA ANCHISTA. X3.5. c, FROM ABOVE; 6, but banding of arms IS 



FROM BELOW; C, SIDE VIEW OF THREE ARM JOINTS NEAR DISK. 11 i , , 



Localities. Albatross station 3746, off Suno Saki, Japan, 49 fathoms, 

 gray sand, pebbles, 2 specimens; station 4894, Eastern Sea, lat. 

 32 33' N.; long. 128 32' 10" E., 95 fathoms, green sand, broken 

 shells, pebbles, 2 specimens; station 4895, Eastern Sea, lat. 32 33' 

 10" N.; long. 128 32' 10" E., 95 fathoms, green sand, broken shells, 

 pebbles, 1 specimen; station 4900, Eastern Sea, lat. 32 28' 50" N.; 

 long. 128 34' 40" E., 139 fathoms, gray sand, broken shells, bottom 

 temperature 52.9, 1 specimen; station 4939, Kagoshima Gulf, lat. 

 31 18' 30" N.; long. 130 42' E., 85 fathoms, 1 specimen. Bathy- 

 metrical range, 49 to 139 fathoms. Seven specimens. 



Type. Cut. No. 25645, U.S.N.M., from station 4900. 



