EEPORT ON THE HOLOTHURIOIDEA. 
Ill 
and Barrett, Danielssen, Sars), ’V^^ite Sea (Jarzynsky), British Islands (Forbes, 
M-'Intosh, Leslie and Herdman, Ludwig, Norman), north and east coasts of North 
America southwards to Cape Cod (Forbes, Duncan and Sladen, Venill, Ayres, 
Stimpson, Ludwig, Liitken), east coast of North America south of Cape Cod at 
Florida Picef (Pourtales), west coast of North America at Gulf of Georgia (Selenka), 
and California (Ayres). 
(Mus. Holm.) A very great number of specimens m different stages of development, 
brought home from North America, Greenland, Iceland, Spitzberg, Norway. 
In old indi\dduals the dorsal pedicels, being spread out over the adjacent parts of 
the three interambulacra — sometimes over the whole odd interambulacrum — 
do not present any well-marked double rows as do the ventral pedicels. The 
irregularly formed plates with uneven or spinous margins seem, as a rule, to be 
rare in the old specimens, and usually I only found them in the pedicels 
or in their neighbourhood. Calcareous ring slender, pliable, spongy, and in 
a comparatively low stage of development, without posterior prolongations. In 
small indi\dduals the pedicels are, on the contrary, very obviously confined to 
the ambulacra even on the dorsal surface, and only a very few scattered ones 
may be found on the dorsal interambulacra. Often in such small forms the 
plates are more common in the dorsal perisome, while they are rare or totally 
absent in the ventral. In very small specimens the dorsal pedicels are fewer and 
smaller than the ventral, and only placed on the ambulacra. 
“ Porcupine ” 'Expedition. — Two spechnens dredged at Station 13;, lat. 40° 16' N., 
long. 9° 37' W.; depth, 220 fathoms. 
Cucurnar'ia frondosa, var. mediterranea, Semper, 1868. 
Hahitat . — (?) Mediterranean Sea (Semper). 
Differs from the type in its madreporic tubercle being much larger and in having two 
Polian vesicles. 
Cucumaria duhiosa, Semper, 1868. 
Body cyhndrical. Tentacles nearly equal. Deposits — large roundish knobbed buttons 
with a few (four) holes; and more elongated ones with slightly more knobs and holes, 
and with one end drawn out, dentate and perforate. Calcareous ring unknown. 
Habitat . — Peru (Semper). 
Cucumaria potrva, Ludwig, 1875. 
Body cylindrical, tapering posteriorly. Tentacles typical. Calcareous ring devoid of 
posterior prolongations. Deposits — large perforated (smooth ?) plates and small 
X -shaped bodies. Dorsal pedicels irregularly dispersed so that no rows are 
traceable. 
* 
Habitat . — Chili (Ludwig). 
