148 HOLOTHURIID.\E. 



Chamisso and Eysenhardt, 1821. The fact needs emphasis, as Ludwig's very 

 careful and important revision of Brandt's species has so generaUy vahdated 

 Brandt's names. 



Holothuria atra. 

 Jaeger, 1833. De Holothuriis, p. 22. 



This very abimdant species is represented in both the collections. It was 

 taken at Rangiroa, Paumotu Islands, September 21, 1899 and at Manga Reva, 

 Paumotu Islands, February 3, 1905. The latter would seem to be the farthest 

 to the southeast that the species is known to range. 



Three specimens. 



Holothuria cinerascens. 



Stichopus (Gj/mnochirola) cinerascens Br.«dt, 1835. Prod, descr. Anim., p. 251. 

 Hololhuria cinerascens Lampert, 1885. Die Seewalzen, p. 82. 



A single specimen of this species, long known imder Selenka's familiar 

 name pulchella, was taken on the coral reef at Manga Reva, February 3, 1905. 

 The record extends the known range far to the southeast. 



Holothuria difficilis. 



Semper, 1868. Holothurien, p. 92. 



Fifteen small specimens which seems to be this species were taken at 

 Makemo, Paumotu Islands, October 20, 1899. The resemblance in the general 

 appearance and in the calcareous particles with those of H. captiva, H. frequen- 

 tiamensis, and Aciinopyga parvula are very striking, and suggest that the four 

 names represent a single species. Examination of good series of specimens 

 from numerous localities will be necessary to get the matter cleared up. 



Holothuria imitans. 

 LuDwiG, 1875. Arb. Zool. Zoot. Inst. Wurzburg, 2, p. 109. 



There is a deep brown holothurian, 110 mm. long by 30 mm. in diameter, 

 in the 1904-1905 collection labeled "114." I am unable to find any interpre- 

 tation of this label for on November 4, if the figures are a date, the Albatross 

 was dredging in more than 1,700 fms. between Panama and the Galapagos, 

 and the specimen is ob\-iously a littoral form. The calcareous particles are 

 tables alone, save for supporting rods in the numerous pedicels which cover 

 the whole body. The tables are very different from those of lajigiiens and while 

 they also differ from Ludwig's figure of the tables of imitans, they are so much 



