REPORT ON THE ASTEROIDEA, 311 
Chorology of the Genus Paragonaster. 
a, Geographical distribution :— 
ATLANTIC: One species between the parallels of 0° and 10° N. 
Paragonaster cylindratus, near the Equator, due south of the Cape 
Verde Islands. 
If Pentagonaster elongatus, Perrier, ultimately proves to be a Para- 
gonaster, as I suspect, it will give two species to the Atlantic, and 
will extend the range of the genus northward to about the fortieth 
parallel, or perhaps a little further. 
EasTERN ARCHIPELAGO: One species between the parallels of 0° and 10° S. 
Paragonaster ctenipes, in the Banda Sea, between the Ki Islands 
and Banda Islands. 
B. Bathymetrical range: 140 to 1850 fathoms. 
As known at present, Paragonaster cylindratus is only found in the 
Littoral zone, whilst Paragonaster ctenipes is confined to the Abyssal zone. 
y- Nature of the Sea-bottom: Paragonaster ctenipes inhabits a ground of Blue mud; 
Paragonaster cylindratus one of Globigerina ooze. 
Chorological Synopsis of the Species. 
Ocean, Range in Fathoms. Nature of the Sea-bottom, 
Paragonaster etentpes . .| Eastern Archipelago. 140 Blue mud. 
Paragonaster cylindratus .| Atlantic. 1850 Globigerina ooze. 
1. Paragonaster ctenipes, n. sp. (Pl. LI. figs. 5 and 6 ; Pl. LIII. figs. 1 and 2). 
Rays five. R=48 mm.; r=12 mm. R=4 7. Breadth of the ray midway between 
the centre and the extremity, 4°5 mm. 
Rays elongate, slender, tapering towards the extremity, rather flat and thin, the trans- 
verse section having a vertically depressed oval outline. Interbrachial ares wide and 
faintly flattened. Rays very flexible in a vertical direction. 
The marginal plates are very broad, and limit the comparatively small and regularly 
pentagonal paxillar area of the disk, The supero-marginal plates are thirty-eight to forty 
in number from the median interradial line to the extremity. Those on one side of the 
