REPORT ON THE HOLOTHHRIOIDEA. 
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Ciicumana tenuis, Liidwdg, 1875. 
Body ovate. Interambulacra almost destitute of deposits. Ambulacra (including 
pedicels) with irregular spinous, perforated plates and spinous rods, the latter more 
frequent than the former ; also terminal plates in the pedicels. 
Habitat . — Celebes (Ludwig). 
Cucumaria frauenfeldi, Ludwig, 1882. Cucumaria, n. sp., Semper, 1868. 
According to Semper, this species is nearly related to Cucumaria frondosa. Deposits — 
rather numerous, in the shape of spectacles, viz., rods with a hole in each 
enlarged end. 
Habitat . — Java (Semper), Cape of Good Hope (Ludwig). 
The description is very incomplete. 
Cucumaria kirchshergii, Heller, 1868. Ocnus (?) {Cucumaria) Jcirchshergii, von 
Marenzeller, 1874. 
Body ovate. Deposits — numerous oblong plates with slightly uneven surface, with 
one end produced into a narrow dentate process and mostly with two rows of 
holes ; also, according to von Marenzeller, small rosettes. Pedicels with terminal 
plates and supporting rods almost resembling those in Cucumaria hyndmanni, to 
which the species seems to bear the greatest resemblance. 
Habitat . — MediteiTanean Sea (Heller, von Marenzeller). 
Cucumaria californica, Semper, 1868. {X) Pentacta frondosa, Ayres, 1855, and 
Stimpson, 1857. 
Body ovate, like that in Cucumaria frondosa. Deposits — large smooth plates with 
a comparatively small number of holes. Pechcels devoid of terminal plates, 
but with a few three-armed, perforated supporting rods. 
Habitat. — IMazatlan in California (Semper). 
Semper says that one cannot distinguish this species from Cucumaria frondosa without 
the most careful anatomical examination, wherefore I am somewhat uncertain 
whether the dorsal interambulacra are naked or carry some scattered pedicels or 
whether the tentacles are equal, as in the species mentioned. Possibly the 
species is only a young form of Cucumaria frondosa. 
y. Calcareous ring in a low stage of development. 
Cucumaria Icevigata {Pentactella), Verrill, 1876 ; Studer, 1877 and 1879; Smith, 1879. 
Tentacles nearly equal. Pedicels of the dorsal and ventral surfaces nearly equally large. 
Habitat . — Kerguelen Islands (Verrill, Studer, &c.). 
An Antarctic form of Cucumaria frondosa. Compare the above description. 
