316 PROCEEDINGS OF THE NATIONAL MUSEUY. VOL. XXXIV. 
One specimen with arms 200 mm. long; there are thirty-five cirri 
40 mm. long, with twenty-seven to thirty-six (usually about thirty- 
three) joints. 
I cannot find any tangible difference between the Japanese form | 
described in 1895 by Hara under the name of macrodiscus, and the 
Australian afra described by Hartlaub two years earher, of which the 
U. S$. National Museum possesses a dried specimen from the South 
Pacific. The latter agrees in all particulars with the Japanese speci- 
mens, and has rather more cirrus joints than did Hartlaub’s type, 
these numbering about thirty-three, as stated in Hara’s description 
of macrodiscus. | 
Family ANTEDONID A. 
Genus PEROMETRA A. H. Clark. 
PEROMETRA DIOMEDEZ (A. H. Clark). 
Sagami Bay, 35° 03’ north latitude, 138° 47° east longitude; 85 
fathoms. (Owston collection, No. 7010.) 
One large and pale specimen; one ray is dwarfed, the arms being 
about half the size of the others; the first costal 1s lacking, the costal 
axillary springing direct from the radial; there is no trace of any 
tubercular elevation; between the first and second brachials on the 
left arm of this ray there is a partial additional second brachial, 
which is visible externally dorsally from the outer side of the arm to 
the median line, its length in the direction of the long axis of the 
arm being about half as great; this partial joint rises to a strong 
tubercle proximally, and a less strong tubercle distally; it does not 
bear a pinnule. 
Sagami Bay; 35° 04’ north latitude, 138° 41’ east longitude; 110 
fathoms; August 6, 1902. (Owston collection, No. 7061.) 
One large and pale specimen. 
Genus RYE R@ WEE wa EVAL VAG Hives @Gilaneke. 
ERYTHROMETRA RUBER (A. H. Clark). 
Sagami Bay, 34° 59’ north latitude, 139° 34’ east longitude; 55 
fathoms; April 23, 1902. (Owston collection, No. 6332.) 
One specimen, resembling the type. 
Genus COMPSOMETRA A. H. Clark. 
COMPSOMETRA SERRATA (A. H. Clark). 
Tokyo Bay; 8-12 fathoms; October 22, 1899. (Owston collection, 
No. 5861.) 
One specimen, resembling the type in the Museum of Comparative 
Zoology, which was taken at the same time and place. 
