54. ‘* ENDEAVOUR” SCIENTIFIC RESULTS. 
Although not taken by the “ Endeavour,” this specimem 
was included in the collection, that a description and figures. 
might be published. I have also had for comparison. and 
have used in drawing up the above description, two specimens. 
also from Lord Howe Island, in the Museum of Comparative 
Zoélogy collection, received from the Australian Museum 
several years ago. As these bore the manuscript name 
O. confertus, it has seemed well to retain it. The species is 
near O. germani, but has only a single madreporite and the 
arms are much longer. In my report on the “ Thetis ” 
tchinodermata! I, with some hesitation, referred an 
Ophidiaster from Lord Howe Island to Perrier’s species, but 
in view of these additional specimens, I am now inclined to 
think these is little doubt that O. germani is quite distinct. 
The character, to the presence of which my hesitation was due, 
is not, however, a constant one, no two of the specimens being 
alike in the arrangement of the subambulacral spines, although 
they are, in all cases, numerous and regularly arranged near 
the mouth. 
Loc.—Lord Howe Island, South Pacific Ocean. 
Genus PSEUDOPHIDIASTER,2 gen. nov. 
Linckiide with three conspicuous series of abactinal plates 
and eight series of papular areas, at base of arms, the actinal 
series tending to disappear distally, near the tip of the pointed. 
arm. Body- “wall thick and leathery with little or no rigidity. 
Adambulacral armature in a_ single series. Actinolateral 
plates in several series at base of arms; no papular areas. 
between them. Pedicellariz present. Madreporite very 
large. Ampulle single, large, with numerous calcareous. 
plates in their walls. No superambulacral plates. 
Ty pe-species.—Pseudophidiaster rhysus, sp. nov. 
This remarkable genus does not differ structurally from 
Ophidiaster in any very fundamental points, but in general 
appearance the difference is very great. Owing to the lack 
of rigid abactinal skeleton, dry specimens are very much 
wrinkled and the longitudinal series of plates are made 
unnaturally conspicuous ; in alcoholic specimens, longitudinal 
furrows are not conspicuous, but numerous transverse grooves. 
1. H. L. Clark—Mem. Austr. Mus., iv., 11, 1909, p. 529. 
re Wevbys=ftalse+ ophidiaster ; in reference to its resemblance to that. 
genus not being apparent. 
