ANNOTATED LIST. 187 
ochre-yellow.” It will be interesting to learn whether further observations confirm the 
presence of a blue rather than a green color in the Riu Kiu form of chloronotus. It may be 
desirable, if this is the case, to recognize a northern subspecies. Kent’s (1893) description 
agrees well with the specimens I saw, and his colored figure is much nearer to nature than 
any other of those which he gives illustrating echinoderms. As he says, this species is, 
for some reason, commercially worthless, the consistency of the body-wall not permitting 
its preservation as béche-de-mer. It would be interesting to know if there is a notable 
chemical difference between the body-wall of this Stichopus and that of Thelenota ananas 
(one of the most valuable béche-de-mers), or whether the difference is purely physical. 
The geographical range of chloronotus is extensive, from Mozambique to the Hawaiian 
Islands; yet it is not known from Tahiti, nor can I find a record from the Red Sea. Kent 
(1893) says it extends southward on the Queensland coast to the ‘‘central Barrier region,” 
and Mitsukuri (1912) records it from Amami-Oshima, in the northern Riu Kius. At Mer, 
chloronotus is often accompanied by a commensal annelid, a species of Gastrolepidia, whose 
color corresponds exactly with that of its host and whose form enables it to retain its posi- 
tion even against a considerable effort to detach it. Whether this worm is G. clavigera, 
which occurs on Holothuria atra in the Maldives, or whether it is an undescribed species 
Ido not know. A crude colored figure of it is given by Kent (1893). 
Stichopus horrens. 
Selenka. 1867. Zeit. f. w. Zool., 17, p. 316, pl. xviii, figs. 27-29. 
Stichopus godeffroyi var. b Semper. 1868. Holothurien, p. 246. 
Stichopus tropicalis Fisher. 1906. Proc. U.S. Nat. Mus., 32, p. 676, pl. lxx, figs. 1-17. 
(Plate 18, Figure 4.) 
This seems to be a species characteristic of the Pacific, for it is unknown west of the 
Philippines. At Mer and at Erub, horrens was common under rocks on the reef-flats. My 
field-notes describe it as ‘‘very irregular and soft, almost repulsive; variegated color.” 
The length of the living specimens was 150 to 300 mm. At Papeete, Tahiti, August 5, 
1913, I found a small Stichopus about 35 mm. long, under a rock-fragment, which is prob- 
ably a young horrens. In life it was pellucid, almost transparent, showing very little color 
of any sort. 
The color in adult horrens is apparently rather variable, for Fisher says that at the 
Hawaiian Islands it is dark olive-green mottled with deep brownish-green; at Mer there 
is usually little indication of green, the browns, white, gray, and blackish combining to 
give an indescribable diversity. One specimen at Mer is, however, described in my field- 
notes as “‘olive-green of 2 or 3 shades, mottled,” which is practically identical with the 
color at Honolulu. 
Fisher records this Stichopus from the Friendly, Samoan, Fiji, Pelew, and Philippine 
Islands, as well as from Honolulu and Puako Bay, Hawaii. We found it at Friday Island 
as well as at Mer, and IJ also found it common at Lahaina and at Hilo, Hawaii. 
Stichopus variegatus. 
Semper. 1868. Holothurien, p. 73, pl. xvi; pl. xvii; pl. xxx, figs. 1, 6. 
This huge holothurian rivals the species of Thelenota in size, for Semper gives the 
measurements of one he saw as 3 feet long and 8 inches in diameter. For the most part, 
however, specimens of variegatus are much smaller than this, usually 300 to 400 mm. 
long and 75 to 100 mm. thick. The color is very diversified. My field-notes at Mer give 
the following descriptions of different individuals: (1) Deep yellow with an olive cast, 
spotted with dark olive, not thickly; tentacles light yellowish. (2) Yellow-brown with 
deep olive lines running diagonally. (3) Blackish; dull yellow-olive above and around 
mouth, and faint indications of a similar shade at small scattered places on back. 
