RECORDS OF W.A. MUSEUM. 
[157 
practically filled up by the small, rough cones of the disk plates. 
Each wedge is covered by a rough, uneven pavement of plates, 
grains and granules, rarely smooth, but usually bearing a ridge, 
lump or small cone. These cones are of very diverse sizes and 
shapes ; they are rarely a millimetre high and are very seldom 
pointed; they commonly terminate in a group of 3-15 little 
spinules. This irregular and very rough pavement extends out on 
the area so that there is no line of division between the latter and 
the disk. None of the cones are enlarged nor have they any defi- 
nite arrangement. The arms branch about eight times ; the first 
division being about 22-27 rnm. from the disk ; the resulting 
branches after each division are often very unequal. Beyond the 
second fork the branches become long and very slender and are 
covered by alternating paired half-circles of granules and glassy 
booklets. Oral surface of disk and arms covered with small 
roundish flat granules, most numerous on the mouth angles and 
bases of the arms. Tentacle-pores small ; first pair (not counting 
buccal tentacles) well within disk, with no tentacle-scales. Each 
succeeding pore is more or less concealed by a slight ridge on its 
adoral side, which carries 4 (rarely 3 or 5) short, slightly curved 
peg-like spines, rather more than half a millimetre long. Each 
spine is compressed and its terminal margin divides into 3-5 little 
glassy spinelets. Each mouth angle carries a cluster of twenty or 
more spiniform teeth and similar but shorter papillae. Genital 
slits small, hardly 2 mm. long, and more or less concealed. Madre- 
poric plate distinct, hardly 2 mm. across. 
Colour, uniform light brown ; in life, “ dull brown.” 
Between Fremantle and Geraldton, W.A., 80-120 fms. Two 
specimens, No. 4921. 
The larger specimen, although 6-rayed, is selected as the Type. 
The occurrence of a new species of Conocladus in West Aus- 
tralian waters is most interesting, the two previously known species 
having been reported only from New South Wales. As Doderlein 
figii, liber Japanische und andere Euryalae, p. 68) has pointed 
out Conocladus is in certain respects a very primitive form mostly 
nearly allied to Astroconus anstralis, Verr. This discovery of a third 
well-marked species would seem to indicate that Australia is 
emphatically the home of these primitive Eurylids and even sug- 
gests that it may have been the ancestral home of the whole order. 
