318 THE VOYAGE OF H.M.S. CHALLENGER. 
ful study, however, reveals the fact that both the species are formed on the same plan 
of structure, and I feel little hesitation in ranking them accordingly under one generic 
head. 
Genus Nectria, Gray. 
Nectria, Gray, Ann. and Mag. Nat. Hist., 1840, vol. vi. p. 287. 
Goniodiscus (pars), Miiller and Troschel, System der Asteriden, 1842, p. 60. 
I see no reason for removing this well-marked genus from the Pentagonasteride ; 
although M. Perrier* has taken that step in the list of species in his memoir on the 
Geographical Distribution of Starfishes. It is true that the form in many respects has an 
intermediate character between this family and the Linckiidee, but the balance of its 
structural details appears to me to be unquestionably Pentagonastrid ; and the further 
evidence borne by the young stages collected by the Challenger seems, in my opinion, to 
emphasise conclusively the justice of its retention in that group. 
Chorology of the Genus Nectria. 
a. Geographical distribution :— 
SouTHERN Ocean and Sours Pactric: One species (or perhaps two) between the 
parallels of 10° and 50°S. 
Nectria ocellifera in Bass Strait (Challenger) ; ‘‘ Mers australes ” 
(Péron and Lesueur). Nectria ocellata (?% specifically distinct) from 
Tasmania and Bass Strait. I have seen® an example of Nectria 
brought from the Fiji Islands, which I refer to the same species. 
B. Bathymetrical range: Littoral zone to 40 fathoms. 
y. Nature of the Sea-bottom: Sand and Shells (Nectria ocellifera ; Challenger). 
Chorological Synopsis of the Species. 
Ocean. Range in Fathoms, Nature of the Sea-bottom. 
Nectria ocellifera . j Southern 30 to 40 Sand and Shells. 
and 
(Nectria ocellata) . South Pacific. 
1 Nouv. Archives Mus. Hist. Nat., 1878, 2e Série, t. i. p. 79. 
2 T am indebted to Mr. Fred. Humble of Leeds for the opportunity of examining this specimen, which was 
found off the Island of Cicia, one of the windward group of Fiji Islands. 
