NS 
eo 
Or 
Puate 50. 
1-6. Kamptosoma indistinctum A. Ag.; “Challenger” Station 272. 
Actinal system of specimen 42 mm, in diameter. 
Abactinal system of the same specimen as fig. 1. 
Odd anterior ambulacrum of the same specimen; the dotted line indicates the position 
of the ambitus. 
. Part of odd ambulacrum on the abactinal side; the abactinal plates are the bottom 
plates. 
. Part of odd ambulacrum, seen from the interior. 
. Inside view of two plates of the odd anterior ambulacrum on the actinal side near 
the ambitus. 
splot elinlin subset Oh 
