36 BULLETIN 75, UNITED STATES NATIONAL MUSEUM. 



sand, stones; bottom temperature 38.9°, 1 specimen; station 4972, 

 off Shio Misaki Light, Japan, lat. 33° 25' 45" N. ; long. 135° 33' E., 

 440 fathoms, brown-green mud, foraminifera, bottom temperature 

 38.1°, 24 specimens. Bathymetrical range, 437 to 587 fathoms. 

 Temperature range, 39.8° to 38.1°. Twenty-six specimens. 



Type.— Cat. No. 25624, U.S.N.M., from station 4969. 



This species is obviously near both alba Liitken and Mortenson and 

 longispina H. L. Clark. It is easily distinguished from alha by the 

 scaling of the disk and the much larger (relatively) radial shields; 

 there are also slight differences in the side arm plates, the oral shields, 

 and the arm spines, so that the two species look unlike. From 

 longispina, the up})er arm plates, side arm plates, and arm spines are 

 quite sufficient to distinguish it, the general facies of the two species 

 being quite different. 



OPHIOZONA PROJECTA. 



Ophiozona projecta Kcehler, Siboga Litt. Oph., 1905, pt. 2, p. 19. 



Locality. — Albatross station 4893, off Goto Islands, Japan, lat. 32° 

 32' N.; long. 128° 32' 50" E., 95 to i06 fathoms, gray sand, broken 

 shells, pebbles, bottom temperature 55.9°, 1 specimen. 



Although this specimen is much larger than Koehler's type 

 (diameter of disk, 7 mm. as against 4) and has much longer arms 

 (35 mm. as against 20), I find no valid characters by which it can be 

 separated from the East Indian species. The basal arm-joints have 

 three spines instead of two, but this might be expected in view of the 

 larger size of the specimen. Koehler does not mention the color of 

 his specimens, but this Japanese one is dull reddish-purple, indis- 

 tinctly variegated above with darker and lighter, and uniformly 

 lighter below. 



Genus OPHIURA. 



While it is to be regretted that a name which has been so widely 

 used as OpliioglypJia must be abandoned, there seems to be no 

 escape from Bell's « reasoning, which shows clearly that Ophioglypha 

 Lyman is a pure synonym of OpJiiura as limited by Agassiz and then 

 by Forbes. Consequently the name OpJiiura is used in this report 

 for the group of ophiurans widely known as Opldoglypha. With the 

 possible exception of Ophiothrix, no genus in the whole class is so 

 greatly in need of revision as is this one. Indeed Ophiothrix is a far 

 more homogeneous group than Ophiura, for there are several very 

 different generic types now included in this genus, of which over one 

 hundred species are known. I regret to be obliged to add so con- 

 siderably^ to this already unwieldy number, but I hope that the 

 figures and descriptions here given will make the ultimate revision 



" Ann. Mag. Nat. Hist. (6), vol. 8, 1891, p. 339. 



