272 



BULLETIN 75, UNITED STATES NATIONAL MUSEUM. 



men; station 4893, Eastern Sea, lat. 32° 32' N. ; long. 128° 32' 50" E., 

 95 to 106 fathoms, gray sand, broken shells, pebbles, bottom tem- 

 perature 55.9°, 4 specimens ; station 4912, Eastern Sea, lat. 31° 39' 40" 

 N.; long. 129° 20' E., 391 fathoms, gray globigerina ooze, bottom 

 temperature 41.9°, 1 specimen; station 5069, Suruga Gulf, lat. 35° 3' 

 10" N.; long. 138° 47' E., 108 to 131 fathoms, mud, sand, broken 

 shells, bottom temperature 55.8°, 3 specimens; station 5070, Suruga 

 Gulf, lat. 35° 3' 25" X.; long. 138° 47' 40" E., 108 fathoms, mud, 

 sand, broken shells, bottom temperature 57.6°, 5 specimens; station 

 5091, Uraga Strait, lat. 35° 4' 10" N.; long. 139° 38' 12" E., 197 

 fathoms, green mud, coarse black sand, pebbles, bottom temperature 

 47.6°, 1 specimen. Bathymetrical range, 83 to 391 fathoms. Tem- 

 perature range, 57.6° to 41.9°. Twenty-six specimens. 

 Tij2)e.— Cut. No. 25605, U.S.X.:M., from station 4892. 



Fig. 136.— Ophiomyxa anisacantha. x 2.5. a, from above; b, from below; c, side view of two 



ARM JOINTS near DISK. 



The differences in number, length, and proportions of arm spines 

 between this species and australis seem to be very constant, and con- 

 sequently adult specimens of the two species are easy to distinguish. 

 Naturally very small specimens can not be separated so easily, but 

 on comparison even they can be distinguished. In the series of 

 anisacantha before me the disk diameter ranges from 5 to 21 mm. 



OPHIOPHRIXUS, new genus." 



Disk nearly naked, carrying only a few scattered scales. Radial 

 shields narrow and compressed, bearing a linear series of erect, acute 



"•"O^w and (jyp'^oc, signifying a bristling, in reference to the bristling combs of spines 

 on the radial shields. 



