316 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 11 



Selenkothuria lubrica (Selenka) 

 PI. 6, figs. 1-17 



Holothuria lubrica Selenka, 1867, p. 329, pi. 18, figs. 59-60. H. L. 

 Clark, 1923, p. 162. Deichmann, 1937, p. 165; 1938, p. 368, 

 text-fig. 4, nos. 1-5. Cherbonnier, 1951, p. 22, pi. 5, figs. 1-11, 

 13. Caso, 1954, p. 418, pis. 1-3, 127 figs. 

 Holothuria lubrica var. lubrica (partim) Panning, 1934, II, p. 45, list 

 of references (fig. 38, copied from Lampert, refers to Selenko- 

 thuria moebi (Ludwig), etc.) 

 Holothuria kapiolaniae Bell, 1887, p. 533, pi. 45, fig. 5. Fisher, 1907, 



p. 653. 

 Non Holothuria lubrica, Sluiter, Pearson, et al. (See Panning, 1934, 



II, p. 45 ; all refer to Selenkothuria moebi Ludwig.) 

 Holothuria pseudo-lubrica Cherbonnier, 1951, p. 22, pi. 4, figs. 16-21; 

 pi. 5, figs. 12, 14-20. 

 Diagnosis: Medium-sized form usually about 10 cm long, some- 

 times reaching a length of 15 or 16 cm. Outer and inner features as 

 for the genus ; stone canal with a long, spirally furrowed head ; occasion- 

 ally 2 or 3 stone canals present. 



Spicules curved rods, about 0.06 mm long, with few to many spines, 

 varying from weakly to strongly developed. Feet with large end plate 

 and a few curved rods in the walls ; sometimes these rods with terminal 

 or marginal holes. 



Color varying from slate gray, often with two rows of black spots 

 on the back, to mottled gray or brown, with the anterior end almost 

 black; or completely black individuals with sulphur-yellow disks on the 

 ventral feet. 



Type: Possibly in Germany; 19 paratypes in the Museum of Com- 

 parative Zoology. 



Type locality : Acapulco, Mexico. 



Distribution: The enormous collections from the Hancock expedi- 

 tions have shown that the species ranges from Ecuador, Colombia, Pan- 

 ama, and Costa Rica, to the northern end of the Gulf of California. A 

 few specimens have been taken in the Galapagos Islands and Clarion 

 and Socorro Islands. There is a single record from Magdalena Bay, 

 west coast of Lower California, not far from Santa Maria Bay, where 

 H. L. Clark reported some specimens in 1923. 



Holothuria kapiolaniae Bell, from Hawaii, was examined in the 

 British Museum. The specimen was dried up but there seems to be no 

 doubt but that it is identical with Selenkothuria lubrica, as Cherbonnier 



