i and Islands | Ai rivii i i 

 /' i M.tlay Peninsula: Tren Lanchestei 



M.il.u Vrchipelago, differenl Stations, see later! 

 tr Saleyer, see later! 

 ■, Indian < >cean 1 >arwin), < >riental species with fairly extensive distribution Annandai i l. 

 i ipical, Indian or Pacific ' >ceans I ) vrw i 

 i ui Greal Kei Island, see later! 



Malaj Archipelago, differenl Stations, see later! 

 /» ./,/. M.il.iy Archipelago, differenl Stations, see later! 



D, •■ . Java Sea rhousand Islands (Aurivilliuj 



/>. trigona, Java Sea rhousand Islands (Aurivillius). 

 D. '). Java Sea: Thousand Islands (Aurivillius). 



/>. aperta, Java Sea rhousand Islands (Aurivillius). 

 D. cungata, Java Sea: Thousand Islands Aurivii 

 D. Maindroni, Sumatra (Gruvel). 

 D. lullata. Java Sea: Thousand Islands Aurivillius). 



The seven species of Aurivillius enumerated in the above list were all of them taken 

 from one and the same stranded specimen of a Palinurus spec. They were found attached to 

 the branchiae or to the interior wal! of the branchial cavity of that crayfish. The name of the 

 species of Palinurus is not given, but it is no doubt permitted to suppose that it was a littoral 

 form no deep-sea species. Dickelaspis Maindroni^ the species described by Gruvei , was also 



found attached to a Palinurus (whether all of them, or only those collected by Mr. Maindron 

 is not distin ctly indicated by Gruvel) and also seems to be a littoral form. For D. Warwicèi, 

 pellucida and Grayi no definite data with regard to their bathymetrical distribution could be 

 given by Darwin. Thej are most probably all of them littoral forms: D. Warwicki was found 

 attached to a crab, Grayi to the skin of a sea-snake, and pellucida also to a sea-snake - they 

 an- most probably forms which live at the surface of the sea. D. equina lives on shallow-water 

 crabs and likewise D. occlusa. 



The species collected by ll.M.S. "Siboga" were found at different depths: 



Dickelaspis Tydemani n. sp. at a depth ol [O — 25 m. 

 Dickelaspis Versluysi n. sp. at a depth of 22 — ^2 m. 

 Dickelaspis Nierstraszi n. sp. at a depth of 27 — 59 m. 

 Dickelaspis orthogonia Darwin at a depth of SS— 112 m. 

 Dickelaspis Weberi n. sp. at a depth of 560 m. 



The last-named is thus the only true deep-sea species of the collection, and as wil! be 



1 from the description it is the largesl of the known species. This is a peculiarity which also 



for many other deep-sea species of Cirripedia (e.g. Scalpellum- and Verruca-specics). 



Tl known deep-sea species of this genus D. sessilisj was collected by the Challenger 



al a depth of about [800 m. All the other species are littoral forms, living 



oing down to d--|,ths of 30, 50, 100 m. at most. In accordance with this 



