TROPICAL P AC I FIC HOLOTHURIOIDEA. 137 



have been proposed in Oneirophanta during the period since the Challenger 

 Report was published. They seem to me to come well within the range of 

 diversity shown by mutabilis. If all are valid, the specimen in the present col- 

 lection from Station 4732 may well be made the type of a new species. It 

 is about SO mm. long and the pedicels and processes are so few and small they 

 might easily be overlooked; the body-wall is like thin glass and the body is 

 full of fine light-colored sand. The other specimens range from 45 to 200 mm. 

 in length and are for the most part glassy and nearly white but one of the larg- 

 est specimens is quite brown. The extent of digitation shown by the tentacles 

 and the number of midventral pedicels are characters of very great diversity. 

 The number and size of the lateral pedicels also show a great range as Theel 

 pointed out; in one specimen 150 mm. long, the pedicels are 20 mm. long by 

 mm. in diameter while the marginal papillae are 45 mm. long and 8 mm. 

 thick at the base. The calcareous plates are very characteristic and while 

 they show considerable diversity, the specific features are not obscured. 



Station 4647. Eastern Tropical Pacific, 4° 33' S., 87° 42' 30" W., 2,005 fms. Bott. temp. 35.5°. Lt. gy. 



and br. glob. oz. 

 Station 4649. Eastern Tropical Pacific, 5° 17' S., 85° 19' 30" W., 2,235 fms. Bott. temp. 35.4°. Fne. 



stky. gr. m. 

 Station 4651. West of Peru, 5° 41' 42" S., 82° 59' 42" W., 2,222 fms. Bott. temp. 35.4°. Stky. fne. 



gy. s., trace of shore-mud. 

 Station 4656> Eastern Tropical Pacific, 6° 54' 36" S., 83° 34' 18" W., 2,222 fms. Bott. temp. 35.2°. 



Fne. gn. m., mang. nod. 

 Station 4658. Eastern Tropical Pacific, 8° 30' S., 85° 36' W., 2,370 fms. Bott. temp. 35.3°. Fne. gn.m., 



mang. nod. 

 Station 4732. Eastern Tropical Pacific, 16° 32' 30" S., 119° 59' W., 2,012 fms. Bott, temp. 34.8°. 



Lt. gy. glob. oz. 



Sixteen specimens. 



Scotodeima parvispiculatum, 1 sp. nov. 

 Plate 4, fig. 7, 8. 



Length, 60 mm.; breadth, 12 mm. Color, dirty white. Body very flat, 

 in bad condition, more or less eviscerated. Tentacles wanting. Dorsally there 

 are six rows of conical papillae, of which two series are along each margin; all 

 the papillae look rubbed but they probably never had very long tips. Arrange- 

 ment of pedicels on ventral surface not distinguishable but there were probably 

 none in midventral ambulacrum at least anteriorly. Marginal papillae smaller 

 and forming a marginal fringe anteriorly. Mouth ventral. Anus dorsal. 



Calcareous particles remarkably small and quite characteristic. They 



1 parvispiculatus = provided with little spicules, in reference to the small size of the calcareous 

 particles. 



