180 



BULLETIN 75, UNITED STATES NATIONAL MUSEUM. 



ooze, bottom temperature 41.8°, 4 specimens; station 4956, Bmigo 

 Channel, Japan, lat. 32° 32' N. ; loncj. 132° 25' E., 720 fathoms, green- 

 brown mud, fine fjray sand, foraminifera, bottom temperature 37.5°, 

 1 specimen; station 4969, off wShino Misaki, Japan, lat. 33° 23' 40" N.; 

 long. 135° 33' E., 587 fathoms, brown mud, sand, stones, bottom 

 temperature 38.9°, 1 specimen; station 5083, off Omai Saki, Japan, 

 lat. 34° 4' 20" N. ; long. 137° 57' 30" E., 624 fathoms, fine gray sand, 

 globigerina, bottom temperature 38.1°, 1 specimen. Bathymetrical 



Fig. 81.— Oi'hiumitra cardiomurpua. X 4. a, from above; 6, from helow; c, side view of two arm 



JOINTS near disk. 



range, 361 to 720 fathoms. Temperature range, 42.7° to 37.5°. Eight 

 specimens. 



TyjM.— Cat. No. 25650, U.S.N. M., from station 4969. 



The smallest of these specimens is rather less than 4 mm. across 

 the disk, but the specific characters are all well shown, except that 

 the radial shields are distally in contact. There is no species of 

 Oi)hiomitra now known with which this species is likely to be confused. 



