TROPICAL PACIFIC HOLOTIICHIOIDKA. 131 



is nearly white with the tentacles bright brown in sharp contrast. In no impor- 

 tant particular do these specimens differ from those originally described. 



Station 4672. Peru: southwest of Palominos Light House, 88 miles. 2,845 fins. Bott. temp. 35.2°. 

 Fne. dk. br. infus. m. 



Two specimens. 



CUCUMARIIDAE. 



Cucumaria abyssorum. 

 Plate 2, fig. 5. 

 Theel, 1886. Challenger Hoi., pt. 2, p. 66. 



The specimens range from 50 to 75 mm. in length and call for little comment. 

 Examination of the body-wall seems to indicate that the calcareous particles 

 decrease in number with age. At any rate, the largest specimens lack spicules 

 more or less completely. 



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. gn. m. 

 Station 4651. Peru: west of Aguja Point, 111 miles. 2,222 fms. Bott. temp. 35.4°. Fne. stky. gy. m. 

 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. 



Thirteen specimens. 



Pseudocucumis africana. 



Cucumaria africana Semper, 1868. Holothurien, p. 53. 

 Pseudocucumis africana Ltjdwig, 1888. Zool. Jahrb. Syst., 3, p. 815. 



On February 8, 1900, six specimens of this very well-marked species were 

 taken at Kusaie in the Caroline Islands, on a reef. This seems to be the most 

 easterly record for the species, which is now known from Japan on the north 

 to Torres Strait on the south and from Portuguese East Africa eastward to 

 Kusaie. 



Echinocucumis bitentaculata. 

 Sphaerothuria bitentaculata Ludwig, 1893. Bull. M. C. Z., 24, p. 112. 



It is difficult to believe that there is any generic distinction between Echino- 

 cucumis typica Sars and Ludwig's Sphaerothuria bitentaculata. In the con- 

 tracted condition in which they are ordinarily taken, it is very difficult, if not 

 impossible, to determine the number and relative sizes of the tentacles, and it 

 is doubtful whether the supposed differences are real and constant. R. Perrier 

 considers Ludwig's genus a synonym of E. Perrier's Ypsilothuria and of this 



