660 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxii. 



*HOLOTHURIA VAGABUNDA Selenka. 



Hololhurta vagnliniida Selenka, Beitr:ijj;e znr Aiuitoinie u. Sys^tematik der IIolo- 

 thurien, Zeitschaft. f. wiss. Zool., XVII, 18(37, p. 334, pi. xix, figs. 75-76. 



Tentacles, 20. Ainbulacral appeiidaoes, generally distril)iited pedi- 

 cels. Deposits : Tables, and buttons. Tables with a not very large 

 disk, and with the spire terminating in eight to ten teeth, placed 

 around the nearly circular aperture in its top. Buttons of the usual 

 form, with six holes. The dorsal pedicels alone have supporting rods, 

 which are spinous and tapered toward the ends. Polian vesicles one 

 to two; one free madreporic canal. Cuvierian organs brownish red 

 to violet, very inconstant in number. Color, dark brown to light 

 reddish l)rown, ventral surface whitish. Length ijbout 200 mm. 



Theel" states that in a number of specimens examined by him the 

 ambulacral appendages appeared to be of nearly equal size on dorsal 

 and ventral surfaces; but he always found the ventral ones cylindrical, 

 and the dorsal ones more papilliform. ''The ventral have a well 

 developed terminal plate and bilaterally symmetrical, perforated sup- 

 porting plates; the dorsal have a rudimentary terminal plate, and the 

 ventral appendages are ahvays more numerous than the dorsal. ^' * * 

 The disks of the tables are sometimes not very well developed, some- 

 times round or angular with a large central hole and several peripheral 

 ones, and their margin is often uneven." 



Not taken by the AIhafr<m expedition. Widely distributed, rang- 

 ing from Panama and the west coast of South America and Hawaiian 

 Islands through the South Sea Islands to east coast of South Africa, 

 thence to Red Sea, East Indies, Philippines, and China (Hongkong). 



*HOLKDTHURIA HUMILIS Selenka. 



Holothnria hum ills Selenka, Beitriige zur Anatoniie u. Systematik der Holoth 

 iirien, Zeitschr. f. Wisis. Zool., XVII, 1867, p. 339, pi. xix, fig. 89. 



Tentacles, 20; uniformly distributed pedicels. Deposits: Tables, and 

 buttons. Tables with not very large disks and with spire terminating 

 in eight teeth, similar to those of vagahunda. Buttons very flat, of 

 usual shape. All pedicels with supporting rods, but ventral alone 

 possessing terminal plates. Calcareous ring very small and of uncom- 

 mon shape, its ten pieces being very small, round, and brown. Several 

 Polian vesicles; free small madreporic canal. Grayish brown. 

 Length, 1^0 mm. 



"Distinguishable from vagahiuula mainly by the peculiar calcareous 

 ring, which is unlike that of any other holothurian." (Theel.) 



Not secured l>y the AJh<itro><.'< expedition. The Hawaiian Islands 

 constitute the only record(Kl locality. 



a Challenger Holothurioidea, Pt. 2, p. 219. 



