EEPOET OX THE HOLOTHHHIOIDEA. 
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posterior prolongations. Deposits — tables with large irregularly perforated disks 
and a long central spire formed by two rods; and minute, irregular, dichotomously 
branched bodies or rosettes. 
Habitat. — Bohol (Semper). 
The following forms of Cucumaria are very unsatisfactorily known, a re-examination 
of them being necessary. 
Cucumaria minuta {Holothuria), Fabricius, 1780 ; Blainville, 1834. Pentacta minuta, 
Jseger, 1833. Dactylota minuta, Brandt, 1835, (?) Psolinus hrevis, Forbes, 
1841; (?) Kowalevsky, 1867. Ocnus ayresii, Stimpson, 1853. Ocnus minutus, 
Semper, 1868. 
Habitat. — Greenland (Fabricius, Llitken, Xorman), north-east coast of North America, 
Grand Manan (Stimpson), British Islands, Fairoe Islands, and Shetland Islands 
(Llitken, Forbes, Norman), Spitzbergen (Danielssen and Koren), (?) Mediterranean 
Sea (Kowalevsky). 
Pedicels placed in simple or zigzag rows along the ambulacra, six to ten in each 
row; according to Lutken, fifteen pedicels in each ventral series and only a few 
in the two dorsal rows. Judging from the descriptions of Lutken and 
Stimpson, I am inclined to believe this species to be more nearly related to 
Cucumaria lactea or planei than to Cucumaria fronclosa. 
Cucumaria assimilis, Dliben and Koren, 1844.. Pentacta assimilis, Verrill, 1873. 
Habitat. — Chiistiansund in Norway (Diiben and Koren), coast of New England (Verrill). 
Apparently resembling Cucumaria lactea of Forbes, in all respects, excepting that its 
deposits seem to be less closely crowded, but, on the contrary, more regularly 
formed. It is doubtless not a distinct species. 
Cucumaria pusilla {Holothuria), Bars, 1828. 
Habitat. — Norway, at Bergen (Sars). 
Probably synonymous with Cucumaria lactea or one of its nearer relatives. 
Cucumaria hr unnea. {Holothuria), Thompson, 1840. Ocnus hrunneus, Forbes, 1841. 
Habitat. — British Islands (Forbes, Thompson, Herdman). 
A very dubious species, which seems to deviate from Cucumaria lactea and Cucumaria 
assimilis only by its brown colour. 
Cucumaria lefevrii, Barrois, 1882. 
Habitat. — West coast of France (Barrois). 
Though there seem to exist some small differences between this form and some of the 
preceding ones, it may, nevertheless, be a very dubious species. According to 
