312 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 11 



Ludwigothuria atra (Jaeger) 

 PI. 2, figs. 18-23 



Holothuria atra Jaeger, 1833, p. 22. Panning, 1934, II, p. 30, fig. 22, 

 complete list of references. 



Diagnosis: Large form, 20 cm or more, with cylindrical smooth 

 body and large tentacles slightly ventrally directed. Numerous soft, 

 retractile feet on the ventrum; dorsal side with more scattered papillae 

 and small feet. Inner anatomy not remarkable, except for the presence 

 of a large number of stone canals, and often with several Polian vesicles. 

 Cuvierian organs apparently absent. 



Spicules tables with a small disk having four marginal holes and 

 well developed spire with the pillars parallel in the upper half and end- 

 ing in 12 sharp teeth. Inner layer consisting of scattered rosettes, often 

 bifurcate and sometimes forming oval buttons. Feet with large end plate 

 and few, perforated plates, sometimes H-shaped ; dorsal appendages with 

 minute end plate or none, and apparently lacking all supporting rods or 

 plates. Color uniformly black or dark brown. 



Type: Presumably lost. 



Type locality: Celebes. 



Distribution : From Mozambique to Hawaii ; also reported from 

 the Galapagos Islands and Cocos Island in the Panamic region, and 

 Clipperton Island (H. L. Clark, 1902). 



Depth: Shallow water, in lagoons. 



Speci?nens examined: Several in various collections. In the Han- 

 cock material are 14 specimens, of which 13 came from the Galapagos 

 and one from Cocos Island; all moderately large, 9.5 to 15 cm long. 



Ludwigothuria kefersteini (Selenka) 

 PI. 2, figs. 24-26 



Stichopus kefersteinii Selenka, 1867, p. 318, pi. 18, figs. 37-40. H. L. 



Clark, 1922, p. 46 (referred to Holothuria). Boone, 1933, p. 



156, text-fig. 8. 

 Holothuria inornata Semper, 1868, p. 252, pi. 40, fig. 1. Deichmann, 



1938, p. 365, text-fig. 2. Panning, 1934, II, p. 33, fig. 28. 

 Diagnosis: Large species, 20 cm or more, with 20 large, almost 

 terminal tentacles. Ventral feet cylindrical, not crowded ; dorsally usual- 

 ly four to six rows of low warts, each carrying a small papilla and with 

 smaller, more or less cylindrical feet scattered between them. Inner 

 anatomy not remarkable except for the presence of numerous small 

 stone canals and three or four Polian vesicles. 



