84 SPOLIA ZEYLANICA. 



species show great similarity, and they agree in the main 

 with the description I have given above. 



Sluiter's figure of the tables differs from Ludwig's, in that 

 the supports of the spire are j)arallel. In Ludwig's they 

 converge as they approach the summit, and there are some- 

 times six supports. Ludwig's specimen had the buttons 

 aggregated around the pedicels and papillae. In Sluiter's 

 they appear to be evenly distributed. 



In the specimen which I have before me the external charac- 

 ters agree more with Sluiter's species, since the tube feet are 

 arranged in three distinct rows, but it resembles Ludwig's 

 specimen in the form of the calcareous ring and the deposits. 



General Distribution. — An uncommon form, confined to the 

 Indo-Pacific littoral regions. 



HoLOTHURiA DiscREPANS, Semper. 



(Plate XII., fig. 20.) 



Holothuria discrepans, Semper 1868 (38); Lampert 1885 (19) ; 

 Theel 1886 (42). 



One specimen, obtained by Professor J. Stanley Gardiner 

 in the Maldives. The specimen is very small, being only 

 20 mm. long. The only other specimens known are two 

 described by Semper (38) from Samoa. 



External Characters. — The colour of the small spirit specimen 

 is yellow below. On the bivium there are a few yellow circles 

 around the papillae and there are several narrow bluish-black 

 transverse bands across the bivium. The trivium bears 

 yellow pedicels which are arranged in three distinct rows, the 

 two outer rows being double and the central row having four 

 sets of pedicels. Semper does not describe the arrangement 

 of the tube-feet. It is possible that in this species, as in many 

 others, the tube-feet are arranged in rows in the young 

 specimens only. There are a few papillse irregularly scattered 

 over the bivium. According to Semper there are thirty 

 tentacles. Owing to the minute size of the specimen under 

 examination I cannot confirm this. 



