4 
116 THE VOYAGE OF H.M.S. CHALLENGER. 
the researches of Barrois, it must closely resemble Cucumaria planci, but is said to 
have the calcareous ring composed of eight pieces and the cups built up of four 
curved spokes. Selenka has already pointed out that the three ventral pieces 
of the calcareous ring are united in Cucumaria planci ; the cups in the latter 
species seem, however, to be usually formed of only three spokes. 
Cucumaria jpanamensis [Pentacta), Verrill, 1867-1871. 
Habitat. — Panama (Verrid). 
Belongs to that group of Cucumaria which has the pedicels in double rows along the 
ambulacra alone. Skin fiUed with very numerous, minute calcareous grains 
or plates, but Verrill does not explain more exactly the shape of these deposits. 
Cucumaria decollata (Holothuria) , Gray, 1848. Cucumaria montagui, Bell, 1883. 
Habitat. — British Islands. 
Cucumaria neillii {Holothuria), Fleming, 1828 ; Leslie and Herdman, 1881. 
Habitat. — British Islands. 
Cucumaria dissimilis {Holothuria), Fleming, 1828 ; Leslie and Herdman, 1881. 
Habitat. — British Islands. 
(?) Cucumaria planciana {Pentacta), Delle Chiaje, 1841. 
Habitat. — Mediterranean Sea. 
(?) Cucumaria ventactes {Pentacta), Delle Chiaje, 1841. 
Habitat. — Mediterranean Sea. 
(?) Cucumaria cucumis {Pentacta), Delle Chiaje, 1841. 
Habitat. — Mediterranean Sea. 
(?) Cucumaria tetraquetra {Holothuria), Delle Chiaje, 1828. Pentacta tetraquetra, 
Delle Chiaje, 1841. 
Habitat. — Mediterranean Sea. 
Cucumaria saxicola, Brady and Robertson, 1871. 
Habitat. — British Islands. As to the deposits, allied to Cucumaria elongata. 
(?) Cucumaria pusillus {Psolinus), Norman, 1864. 
Habitat. — British Islands (Norman). 
Cucumaria thomsoni, Hutton, 1879. 
Habitat. — Stewart Island, New Zealand (Hutton). 
