TROPICAL PACIFIC HOLOTHURIOIDEA. 1 17 



almost hard with a perfectly smooth surface, showing no pedicels or adherent 

 particles; oilier-, are less firm and show numerous pedicels and more or less 

 adherent foreign material; still others are soft and flaccid, often with so much 

 adherent material as to obscure the pedicels. All agree, however, in the absence 

 of calcareous particles in the skin and in the presence of the vertical groove for 

 the anus. The species of Pseudostichopus are perplexing but I see no good 

 reason why these specimens should not all be referred to mollis. The differences 

 between them are almost certainly artificial, except such as are due to age. 



Station 4641. Galapagos Islands: Hood Island, 12 miles southeast of Ripple Point, 633 fms. Bott. 



temp. 39.5°. Lt. gy. glob- oz - 

 Station 4647. Eastern Tropical Pacific, 4° 33' S., 87° 42' 30" W., 2,005 fms. IS,,t l . temp. 35.5°. Lt. gy. 



and br. glob. oz. 

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



Fne. gn. ni., mang. nod. 

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



Fne. dk. br. infus. m. 



Twelve specimens. 



Stichopus chloronotus. 

 Brandt, 1835. Prod, descr. Anim., p. 250. 



A single specimen of this wide-spread Indopacific species was taken at Uola, 

 Caroline Islands, February 15, 1900. 



Stichopus variegatus. 

 Semper, 186S. Holothurien, p. 73. 



It is a matter of no little interest that this well-known Indopacific species 

 w T as found at Easter Island, December 21, 1904. The known range is thus 

 extended many hundred miles to the southeastward. The specimen is a large 

 one but strongly contracted. 



Holothuria arenicola. 



Semper, 1868. Holothurien, p. 81. 



A single specimen about 80 mm. long was taken at Perico Island, Panama, 

 October 26, 1904. The species was previously known from the Galapagos and 

 its occurrence at Panama is therefore not surprising, but it is quite possible 

 that comparison of good series from the East Indies, the Galapagos, and Panama 

 will show specific differences not at present suspected. Fisher (1907, Proc. 

 U. S. Nat. Mus., 32, p. 664) has pointed out that the name maculata Brandt 

 which has long priority over arenicola, is invalidated by Holothuria maculata 



