REPORT ON THE HOLOTHURIOIDEA. 
159 
bundle, are comparatively small, while the posterior ones have a length of about 6 
mm. The specimen examined being a female, the genital tubes are present in the 
shape of strings of pearls. The intestinal tube is spoiled, but a very well-developed 
respiratory-tree is left, which has the length of the body itself and is attached to the 
right dorsal interambulacrum by means of numerous threads. This tree consists of a wide 
tube and numerous bush-like branches. Probably the left tree has been thrown away 
together with the intestinal canal. 
Genus Stichopus, Brandt, 1835. 
Sticliopus mohii, Semper, 1868 (PI. IX. fig. 1). 
Habitat. — Bermudas ; one specimen. 
The single specimen brought home by the Challenger Expedition is rather deformed 
and compressed ; however, there seems to be but little doubt of its identity with the 
species of Semper. Length, 135 mm. Tentacles eighteen. The dorsal ambulacral 
appendages small, and scattered without order ; those situated along the sides of the body 
seem to be slightly larger. The tentacles are withdrawn into the body, and the anterior 
aperture is surrounded by a crowm of small papillae. 
In addition to the smaller tables (PI. IX. fig. 1, a, b, c), measuring about 0'04 mm. in 
height, and provided with up to twenty teeth in the top of the spire, I have found some 
scattered larger ones (PI. IX. fig. 1, d, e), which are not mentioned by Semper; probably 
they have escaped his attention. The difierences between these two kinds of tables will 
be best understood from the figures. The smaller tables are more solid, and their disks 
measure about 0'04 mm. in diameter. The larger tables have a height of 0'06 mm. and 
about the same in diameter ; their spire has a rounded and finely spinous top. The 
transverse rows of the pedicels (PI. IX. fig. l,f) have a length of 0’38 mm. The 
C-shaped (PI. IX. fig. 1, g) bodies are often about 0’052 mm. long, but they vary much in 
size and shape. 
Stichopus chloronotus, Brandt, 1835 (PI. VII. fig. 6). 
Habitat. — Tongatabu (Friendly Islands) ; a single specimen. Fiji Islands ; five 
specimens. 
Colour, olive-brown. Tentacles twenty. Mouth surrounded by a crown of papillae. 
Dorsal ambulacral appendages in the shape of conical warts or protuberances distributed 
in a double alternating row along each side of the body as well as along the dorsal 
ambulacra ; their arrangement in a double row is more distinct in the dorsal ambulacra 
than on the sides. The odd interambulacrum and those of the sides of the body are 
naked. The ventral pedicels are crowded, and their arrangement in longitudinal series 
