ACTINOPODOrs HOLOTHUEIOIDEA. 149 



is a mere matter of opinion whether a specific or varietal value 

 is to be assigned to each of the forms within the group. There 

 can be hardly any doubt that //. tenuissima Semper is a synonym 

 of this species. 



Locality ;— Nicobar (Sempek '67—8) ; Fiji (Semper '67—8) ; Samoa 

 (Semper '67— S) ; Simcla Is. (Koehler ^95 j ; Java (Sluiter '9-j) ; Moluccas 

 (Sluiter '95) Lumu-Lumu (SLunER : 01) ; Gisser (Sluiter : 01) : Amami- 

 Oshima, S. of lüüshu. 



Holothuria cleniens Ludwig ? 



I have a specimen (Sp. No. 1231) taken in shallow water at 

 Manjuyod, South Negros, Philippine Is., by Dr. B. Dean and 

 kindly given me by him, which belongs in this group of species. 

 It is now much contracted, being Gx4.5 cm., but in hfe must ]iave 

 been 12 cm. or more in length. Its ground color is white, this 

 being the color of the whole ventrum. On the dorsum, however, 

 the middle is occupied by several large dark brown patches more 

 or less confluent, and also on each side there are four smaller 

 patches of the same color. The specimen being eviscerated, I can 

 not make out the genital organs. It lias one long Polian vesicle 

 and one stone-canal which is attached to the mesentery including 

 the madreporic plate. Cuvier's organ can not be well made out 

 although tlie respiratory trees remain. The calcareous deposits 

 are the usual dehcate rosettes in the dorsal perisome and plumper 

 biscuit- shaped or incomplete rosettes with the oval bodies as the 

 most abundant element. Ambulacral appendages irregularly but 

 uniformly scattered over the body. Dorsal appendages have only 

 very small end-plates, and have dehcate, slender, rod- shaped support- 

 ing rods with somewhat bifurcated ends. Anus with Ave groups of 

 small papillae. Calcareous ring as usual in the group. 



As the species of this group are marked mostly by external 



