eel 
NAME OF SPECIES Depth at which collected 
V—V—<§KeCV" nnn 
Scalpellum poculum n. sp. . . 
g18 m. 
Verruca casula n. sp. | 924 m. 
Pe EMODICUIG GMASPe ts as eke a wee | 924—959 m. 
Alepas ovalis n. sp. nae eae ae 984 m. 
sealpellum javanicune N. Sp... -. 2... i. ees. | 1018 m. 
BIR BELIUUD UME SDS “SS ees | 1158 m. 
MEA OLLU MIRE EDIE TUMPSD --. ses | 1158 m. 
rer usar iran WGK wk a ee | L300 in: 
pemeperrume destencium Woek:;........... 1301—2218 m. 
Seaipellum sessile D. Sp. ...........:..' 1570 m. 
RIGID EUIUME TOF MOSUME TSP... se ee ww we | 1570—2081 m. 
Scalpellum moluccanum Hoek........... 1788 m. 
SI OL ETT RS 0 | ‘1788 m. 
SO SALOT DS LALIT Aes | ce | 1886 m. 
SUE ONE T RAL | a 2050 m. 
uaipelmme temixicosum MN. Sp.t 2. 2. 2. wc es 2050 m. 
Per ere eU CI (AIOTT. SP... 2 2. aw we eee 2081 m. 
DHNWEllam irapezotneum TN. Sp. . 3... 2. es | 2796 m. 
GMI PE UmE RELOPONUML TY. SPs... se. oe ee 2798 m. 
Scalpellum sculdtum n. sp... .. 2.0.2.0 | 2798 m. 
Re peM uM RaESCOVORED. SP. 6... 6 8 os 8 eee | 2798 m. 
We see at once from this list that the bathymetrical distribution of the Cirripedia 
follows the same rules in the Malay Archipelago as it does in other parts of the world, or 
in the world’s oceans in general. In this respect a comparison of this list with the one published 
on pp. 21—22 of my report on the Cirripedia of the Challenger-expedition may be instructive. 
The number of species collected during shore-exploration, or when exploring coral reefs is 
important in the present list, whilst only very few species were collected in that way during 
the cruise of the Challenger. Such is the case with the Cirripedia from shallow water, which 
are also much more numerous in the Siboga-collection. The two collections, however, agree in 
so far as both the coast- and shallow-water forms belong to numerous and very different 
genera, this not being the case with the species occurring in deeper water, let us say, of more 
than 200 m. depth. Although the “Subclass’’ is there still represented by numerous species, 
the number of genera diminishes considerably until we come to still greater depths, where 
practically only two genera are represented: Verruca and Scalpellum. Of the 77 Challenger- 
Cirripedia, 31 were collected at depths less than 500 mm., and 46 in deeper water. Of 
these, 41 belong to the two genera Verruca and Scalpellum, 2 to Poecilasma, 1 to Alepas, 
1 to (Balanus) Hexelasma and 1 to Dichelaspis. Of the 114 species collected by the Siboga 
79 come from depths less than 500 m., 35 from deeper water. Of these, 25 belong to Verruca 
and Scalfellum, 7 to other genera: 2 to Poecilasma, 2 to Alepas, 1 to Dichelaspis, 1 to 
1 This name is to take the place of Sc. arvcuatum, used already by DARWIN for a fossil species. 
