The bathymetrical distribution is not known for all the species. P. vagaus was found 

 attached to a Nautilus and may be considered as a pelagic species, P. fissum lives on crabs, 

 one of which was found under a stone at low water (Darwin), another (a Palinurus-species) 

 was thrown on the shore (Aurivillius) : it is, no doubt, a true littoral form. P. eburneum was 

 taken by the "Siboga" at depths from 40 — 90 m. and seems to be a shallow-water form. 

 P. dubium, P. cxcavatum and P. obliquum were found at depths varying from 200 to 300 m. 

 P. Kaempferi, P. carinatum, P. gracile and P. unguiculus go down to 500 — 900 m., P. 

 carinatum being the only one taken at so great a depth as 1633 m. 



1. Poecilasma carinatum Hoek. PI. I, fig. 1. 



1883. HOEK, Cirripedia of the Challenger. p. 44, pi. I, fig. 8 — 10; pi. II, fig. I; pi. VII, fig. 6 — 7. 



This species was taken during the cruise of the "Siboga" at 



Stat. 177. Sept. 1, 1899. Lat. 2° 24.5 S., Long. I29°38'.5E. Depth, 1633 m. Bottom: dead coral 

 and stones, covered with manganese. (About half-way between Misool and Ceram). 

 and at 



Stat. 284. January 18, 1900. Lat. 8°43'. 1 S., Long. I27°i6'.7E. Depth, 828 m. Bottom: grey 

 mud. Attached to a small stem of Clirysogorgia Jlexilis (Wr. & St.). One specimen. 



Only one group of 3 specimens and one single specimen were taken. As my figure of 

 this species reproduced on PI. I of the Report on the "Challenger" Cirripedia is not quite 

 satisfactory, I have made a new drawing from the group of specimens collected by the "Siboga" 

 at Station 177. 



This species affords a striking example of the world-wide distribution of some deep-sea 

 species; whereas the "Challenger" collected it off Culebra Island (West Indies) at a depth of 

 713 m. and off Ascension Island (Atlantic Ocean) at a depth of 768 m. it was taken by the 

 "Siboga" in the East Indian Archipelago at a depth of more than 1600 m. and again at a 

 depth of 828 m. According to Gruvel 1 it is also found at the coast of Cuba at depths varying 

 between 600 and 900 m. 



2. Poecilasma gracile Hoek. 



1883. HOEK, Cirripedia of the Challenger. p. 46, pi. II, fig. 2 — 4. 



This species was collected by the "Siboga" at 



Stat. 38. April 1, 1899. Lat. 7°35'.4S., Long. ii7°28'.6E. Depth 521 m. Bottom: coral. 

 (North of Sumbawa). 



The "Challenger" took one specimen off Sydney (Australia) at a somewhat greater 

 depth, viz. 750 m. In the collection of the "Siboga" it is represented by three specimens. 

 Two of them are attached to the spine of an echinid, the third to a much thinner spine - 

 perhaps of an echinid also. The largest specimen measures with the peduncle 11,5 mm., the 

 capitulum alone having a length of 9 mm. The specimen collected by the "Challenger" was 

 smaller, viz. 8 mm. entire length, its capitulum measuring nearly 7 mm. 



1 Gruvel. A., Monographie des Cinhipèdes. Paris, 1905, p. 115. 



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