REPORT ON THE HOLOTHTJRIOIDEA. 
35 
Norman, Ludwig, Eabricius, Stimpson, &c.), north of American continent, viz., 
Fundy Bay (Stimpson), (?) Massachusetts Bay (Selenka), East Port (Selenka, Ayres, 
Verrill), Labrador and Grand Manan (VerriU). 
(Mus. Holm.) Numerous specimens from different localities of the Arctic Sea. 
Chirodota rotifera {Synapta), Poiirtales, 1851; Stimpson, 1860; Verrill, 1867-1871 ; 
Ludwig, 1881 and 1882. 
Each of the tentacles with twelve, or fewer, digits. Wheel-papillEe scattered all over 
the interambulacra. Polian vesicles several. Besides the wheels, a few slightly 
curved rods with the ends slightly enlarged and uneven. 
Hcibitat . — Biscayne Bay, Florida (Pourtales), Brazil (Ludwig), Bahia and AbroUios 
Pieefs (Eathbun and Verrill). 
According to Ludwig the colour is whitish, while the specimens examined by Pourtales 
and Verrill were of a light purplish colour and have only eight to ten digits on 
each tentacle. The species in question differs from the preceding one mainly by 
its being viviparous (according to Ludwig), by the presence of curved ribs 
besides wheels, and by the arrangement of the ciliated cups. Notwithstanding 
this, the two species must be very nearly allied. 
Chirodota rigida, Semper, 1868. 
Tentacles with about thirteen digits. Crowded whitish wheel-papillae on the dorsal inter- 
ambulacra ; simple rows of them along the ventral interambulacra. Besides the 
wheels, curved rods with the ends slightly spinous. Four large and ten to 
twelve small Polian vesicles. 
Ealitat. — Bohol, Pliilippme Islands (Semper). 
Chirodota pygmcea, ]\[tiller, 1850. 
Tentacles with eight digits. Wheel-papilke arranged in five irregular series. Several 
Polian vesicles. 
Habited ? According to Yerrill it l^elongs to the Caribbean fauna, but MiiUer 
himself supposes it to have been dredged in the Mediterranean Sea. The species 
is imperfectly known, possibly identical with one of the preceding forms. 
Chirodota eximia, Haacke, 1880. 
Tentacles with seven digits. Wheel-papillae arranged in five simple interradial rows. 
Besides the wheels, numerous buttons ( = schnallenformiger Hautkalkkorper). 
Habitat . — Mauritius (Flaacke). 
Cldrodota purpurea [Holothuria, Fistidaria), Lesson, 1830; Jaeger, 1833. 
Habitad . — Soledad in Falkland Islands (Lesson). 
Compare the description given in the text concerning the Challenger specimens. 
According to Lesson, only ten tentacles, each with six digits, are present, but 
