REPORT ON THE ECHINOIDEA—MORTENSEN 23 
Remarks.—That the forms described under the names Astheno- 
soma grubei, A. urens, and A. heteractis are simply synonyms of 
A. varium, as has repeatedly been suggested, can no longer be 
doubted. 
ASTHENOSOMA IJIMAI Yoshiwara 
Asthenosoma ijimai YosHrwara, Annot. Zool. Japon., vol. 1, p. 8, pl. 2, figs. 
S-i2, 1897.—MorTENSEN, Ann. Mag. Nat. Hist., ser. 7, vol. 14, p. 87, pl. 3, 
figs. 1, 2; pl. 5, figs. 1-8, 10, 12-14, 1904; Monograph of the Echinoidea, 
vol. 2, p. 288, pl. 63; pl. 64; pl. 65, figs. 1, 2, 1935. 
Localities —Station 51386; in the vicinity of Jolo (Sulu); Jolo 
Light bearing S. 37° E., 0.7 mile distant (lat. 6°04’20” N., long. 
120°59’20’" E.); 40 meters; sand and shells; February 14, 1908. 
One large specimen. 
Station 5141; in the vicinity of Jolo; Jolo Light bearing S. 17° 
E., 5.5 miles distant (lat. 6°09’00’ N., long. 120°58’00’”’ E.); 53 
meters; coral sand; February 15, 1908. One small specimen. 
Station 5142; in the vicinity of Jolo; Jolo Light bearing S. 50° 
W., 3.9 miles distant (lat. 6°06’10’’ N., long. 121°02’40’ E.) ; 
38 meters; coral sand and shells; February 15, 1908. One specimen. 
Station 5482; in the vicinity of Surigao Strait; Cabugan Grande 
Island (N.) bearing N. 87° W., 4.5 miles distant (lat. 10°27’30’ 
N., long. 125°18’00’’ E.); 122 meters; broken shells, sand, and 
green mud; July 380, 1909. One large specimen. 
Remarks.—This species having been hitherto recorded only from 
the Sagami Sea, Japan, it is of considerable zoogeographical inter- 
est that it has been found in the Philippine seas by the Albatross. 
I have also myself taken it there, off Jolo, in 1914, and later, in 
1922, at the Kei Islands, which indicates that it will eventually be 
found to be widely distributed in the Malay Archipelago. 
ASTHENOSOMA DILATATUM Mortensen 
Asthenosoma dilatatum MorRTENSEN, Monograph of the Echinoidea, vol. 2, p. 292, 
pl. 65, figs. 3, 4; pl. 82, fig. 4; pl. 83, figs. 15-17, 1935. 
Locality —Station 5142; in the vicinity of Jolo (Sulu) ; Jolo Light 
bearing S. 50° W., 3.9 miles distant (lat 6° 06’ 10” N., long. 121° 
02’ 40’ E.); 88 meters; coral sand and shells; February 15, 1908. 
One specimen. 
Remarks —This is a very young specimen, only 10 mm. in diam- 
eter. It differs from the type specimen in the much darker color of 
its spines, a difference that may, however, be due simply to preserva- 
tion. The specimen, which has apparently been dried out, gives 
the impression of having assumed a darker color through having 
been preserved together with comatulids. As is explained in the 
reference given, the numbers of its coronal plates differ remark- 
