’ 
34 ‘* ENDEAVOUR” SCIENTIFIC RESULTS. 
base of the ray there are 8 such series. Actinal interradial 
areas large, covered by the transverse series of squarish, 
scarcely overlapping plates; these plates have the paxilla 
stalk reduced to an oval knob, but the spinelets are long, 
numerous and flaring. Adambulacral plates more than 70, 
wider than long ; those nearest the mouth are about 2 mm. 
wide by a millimeter long ; furrow margin with 3, or usually 
4, slender, blunt, somewhat flattened spines of which the 
middle one or two are longest and may be 2 mm. long; outside 
of this series are three or four parallel series of similar but 
smaller spines : the whole plate is thus fairly well covered by 
15-20 spines, the marginal ones largest, the outermost like 
those on the actinal plates. There are no_pedicellarie. 
Oral plates conspicuous, swollen ; each bears a curved ridge 
5 mm. long, carrying a double series of spines ; these ridges 
lie with concave surfaces together, so that although in contact 
distally and proximally, they are well separated at the middle ; 
the spines at the distal end are like the spines on the actinal 
plates but become longer and stouter proximally and at the 
tip of the jaw are larger than any of the adambulacral spines. 
Colour, light yellowish-brown or dirty yellowish. Five 
specimens. 
The previously known species of this genus are from the 
North Atlantic, from the Pacific, west of the southern point 
of America, and from the Moluccas. The discovery of this 
fourth species south-east of Australia is therefore of great 
interest. There is little reason to doubt that it is a Mimaster, 
but it is easily distinguished from the previously known 
species by the shape of the rays, and by the adambulacral 
armature. In the appearance and position of the madreporic 
body, the Australian species resembles MW. cognatus, the South 
American species ; in the North Atlantic species VW. tizardi, 
the madreporic body is concealed by paxille. The genus is 
a perplexing one and its real relationships are still obscure. 
Locs.—South of Gabo Island, Victoria, 200 fathoms. This 
specimen has been selected as the holotype. 
Between Gabo Island, Victoria. and Disaster Bay, New 
South Wales, 50-100 fathoms. 
Genus Nectria, Gray. 
NECTRIA OCELLATA, Perrier. 
Nectria ocellata, Perrier, Arch. de Zool. exp. et gén., v., 
1876, p. 4. 
This is a nice series of twenty-two specimens, the smallest 
having R=17 mm. and the largest, R=130mm.__In the latter 
