TROPICAL PACIFIC HOLOTHURIOIDEA. 143 
HOLOTHURUDAE. 
Mesothuria megapoda,' sp. nov. 
Plate 4, fig. 9, 10. 
Length about 40 mm. Color, pinkish white. Eviscerated and in bad 
condition so even the generic position is not certain, but the calcareous tables 
show such similarity to those of M. murrayi and M. multipes that there is little 
doubt the specimen represents a species of Mesothuria. Body rather uniformly 
covered with large pedicels, 2-3 mm. long and .50-.75 mm. in diameter; there 
is no arrangement in series or bands, nor are any of the pedicels conspicuously 
larger than the others. There are no supporting rods in the pedicels but there 
are well-developed terminal plates. 
Calcareous particles consist of very numerous tables (Plate 4, fig. 9) with 
spires 100-135 » high; the three rods making up the spire are enlarged, curved 
outwards and rough at the tip. The disks (Plate 4, fig. 10) are 150-200 u across 
and are perforated with seven nearly equal holes, one at center with six around 
it; while they are not all exactly alike, they exhibit little diversity. 
Station 4742. Eastern Tropical Pacific, 0° 3’ 24’”’ N., 117° 15’ 48” W., 2,320 fms. Bott. temp. 34.3°. 
 Fne. It. gy. glob. oz. 
One specimen. 
Although the specimen is in such poor condition its specific characters 
are well marked. It is distinguished at once from M. multipes by the larger 
pedicels, the presence of a well-developed terminal plate and the larger, lower 
tables. In multipes, the disks of the tables are only 75-100 u across, while 
the spires are much more than that. From M. murrayi, megapoda may be 
readily distinguished by the uniform and large size of the pedicels and by the 
_ difference in the tables. In murrayi, the disks are only 70-120 u» across but 
have more numerous perforations. 
Mesothuria multipes. 
Mesites multipes Lupwic, 1893. Bull. M. C. Z., 24, p. 106. 
Mesothuria multipes Lupwic, 1894. Mem. M. C. Z., 17, p. 31. 
The specimen at hand has eviscerated so nothing can be said of its internal 
anatomy. Otherwise it agrees well with Ludwig’s description except that the 
tentacles are very dark colored, deep purplish. It is 60 mm. long. 
1 ueyaro60s= having large feet, in reference to the unusually large pedicels. 
