REPOET ON THE HOLOTHURIOIDEA. 
37 
Chirodotci vitiensis, Griiffe, Semper, 1868. 
Tentacles eighteen, each with twenty digits. Wheel-papilhn much more thinly scattered 
on the two ventral interambulacra. Six large and three small Polian vesicles. 
Especially characterised by the smallness of the calcareous ring. 
Habitat. — Fiji Islands (Semper). 
Chirodotci duhia, Semper, 1868. 
Tentacles eighteen, each with eighteen to twenty digits. Wheel-papillre scattered all 
over the body. Five larger and three smaller Polian vesicles. Besides the 
wheels, small ribs or rods. 
Hxljxtctt. C/ami^nm in Philippine Islands (Semper), Ceylon (Walter). 
So far as I can discover, this species is very closely allied to Chirodota variabilis, 
CMroclota inconrjrua, Chirodota vitiensis and possibly even to Chirodota discolor, 
and there seems to be good reason for the supposition that they are varieties of 
the same species. 
Chirodota panaensis, Semper, 1868. 
Tentacles nineteen, each with thirty to thirty-two digits. Wheel-papillaj scattered all 
over the body. Three larger and five to seven smaller Polian vesicles. Besides 
the wheels, .small oval or elongate rods. 
Habitat. — Philippine Islands (Semper). 
Chirodota rubeola {Fistularia), Quoy and Gaimard, 1833; Selenka, 1867. 
Tentacles twenty. Body smooth. Description very unsatisfactory. 
Habitat. — New Ireland (Quoy and Gaimard). 
Genus 5. Myriotroehus, Steenstrup, 1851. 
Tentacles twelve, digitate. Deposits — large, free, scattered wheels with numerous 
(as many as nineteen) spokes and about as many rather large triangular teeth, 
directed inwards from the margin. Sexes distinct. 
Myriotroehus rinkii, Steemstru]?, 1852; Liitken, 1857; Theel, 1877 ; Danielssen and 
Koren, 1879 and 1882 ; Duncan and Sladen, 1881. (?) Chirodota brevis, 
Huxley, 1852. (?) Oligotrochus vitreus, M. Sars, 1866, and G. 0. Sars, 
1871. Myriotroehus vitreus, Duncan and Sladen, 1881. 
Habitat.- — Coast of Norway from Christiania Fjord to the Arctic Sea north of Norway 
(Sars, Storm, Danielssen and Koren), Nova Zembla and Sea of Kara (Th4el, 
Stuxberg), Spitzbergen (Ljungman, Heuglin, Danielssen and Koren), Barents 
Sea (Hoffman), Greenland (Steenstrup, Liitken, Norman, Duncan and Sladen, 
