IX 



NAME OF SPECIES 



Depth at which collected 



Scalpclhtm poculum n. sp. . . . 



Vcrrttca casttla n. sp 



Verruca navicula n. sp 



Alepas ovalis n. sp 



Scalpel htm javaniaivi n. sp. . . 

 Scalpclhtm hitmile n. sp. . . . 

 Scalpclhtm gracile n. sp. . . . 



Verruca nitida Hoek 



Scalpclhtm distinctum Hoek . . 



Scalpclhtm sessile n. sp 



Scalpclhtm formosum n. sp. . . 

 Scalpclhtm móluccanum Hoek . 

 Scalpclhtm inflatum n. sp. . . . 

 Scalpclhtm elegans n. sp. . . . 

 Scalpclhtm virgatum n. sp. . . 

 Scalpellum ventricósum n. sp. x 

 Scalpclhtm ciliatum n. sp. . . . 

 Scalpclhtm trapezoideum n. sp. 

 Scalpclhtm hexagomtm n. sp. . 

 Scalpclhtm sculptum n. sp. . . 

 Scalpclhtm discolor n. sp. . . . 



91S m. 



924 m. 

 924—959 m. 



984 m. 



x o 1 8 m. 



1 1 58 m. 



1 15S m. 



1301 m. 

 1301 — 22 18 m. 



1570 m. 

 1570 — 2081 m. 



1788 m. 



1788 m. 



1886 m. 



2050 m. 



2050 m. 



2081 m. 



2796 m. 



2798 m . 



2798 m. 



2798 in. 



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 numero us 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 Scalpclhtm, 2 to Poecilasma, 1 to Alepas, 

 1 to (Ba/anus) 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, 28 belong to Verruca 

 and Scalpclhtm, 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. arcuatum, used already by Darwin for a fossil species. 



