ACTINOl'ODOUS HOLOTHURIOIDEA. 11 



may be compared to the brim. On the dorsal sarface, there are 

 mucli more slender papillae scattered apparently without any 

 regularity but with a tendency, it seems to me, to be arranged 

 over the two ambulacra. There are two Polian vesicles. No 

 calcareous spicules can be discovered in the skin. Neither can 

 the calcareous ring bo discovered. 



It is with very great hesitation that I connect the name of 

 Paelopalidcs pufpurco-pimclutus of SLUriEU with this species, but 

 after repeated and careful perusals I can not help having a 

 suspicion that it belongs there, and I simply record that suspicion. 

 This is very much strengthened by the presence in my specimens 

 of the blind sac mentioned by Sluitek (p. 44) as occurring in 

 the anterior part of the digestive tube. In my specimens, the 

 blind sac should be described as consisting of two parts : one 

 larger dark violet or purple part lobulated and evidently glan- 

 dular, and a second lighter- colored gland -like part attached to 

 the duct of the first. They seem to open not much behind the 

 circular canal. 



The sexual organs are very long, and bundles of smaller 

 bundles in front of well-developed tubes are very distinct. Two 

 respiratory trees are well developed and reach (juite to the 

 front. 



Localifij: — " CJiiiUciigor " St:it. 235 (Theel '86); " Siboga " Stiit. 316, 

 314, 101 (Sliitei! : 01) ; Siuugii Bay. 



Genus Synallactes liunwio 1893. 



Body cylindrical or subcyhndrical. 20 ( — 18) tentacles. No 

 tentacular ampullae. Stone-canal attatched to the body wall. 

 Ventral surface flattened but without any marginal border. Ventral 



