NO. 1608.] NEW SPECIES OF CRINOIDS—CLARK. DAL) 
Color (in spirits) —Dull yellowish white; probably yellow in Iife. 
Locality —Albatross Station No. 3887; Mokuhooniki Islet bearing 
S. 15° W. 8.8 miles distant (north coast of Molokai); 552-809 
fathoms; globigerina mud. 
One specimen, much mutilated. 
Type.—Cat. No. 22685, U.S.N.M. 
Remarks.—Atelecrinus conifer is at once distinguishable from the 
three other species of the genus by having three instead of two col- 
umns of cirrus sockets in each radial area on the centro-dorsal. It 
lacks the peculiar groove between the basals and the centro-dorsal 
which is found in the other Pacific species, and is much the largest 
species yet discovered. 
Atelecrinus was first discovered off Cojima, near Habana, Cuba, 
and later at many points in the Caribbean Sea, and off the Brazilian 
coast, southeast of Pernambuco; later the Challenger discovered it in 
the south Pacific near Fiji. The discovery of a species in the 
Hawaiian Islands, therefore, greatly increases its known geographic 
range. 
Family EUDIOCRINID®. 
Genus DECAMETROCRINUS. 
DECAMETROCLiNUS RUGOSUS, new species. 
Centro-dorsal very low, hemispherical, bearing about 90 closely 
crowded cirri; a rather large bare polar area, the surface thickly 
studded with shallow pits. 
Cirri broken off at the base; the longest fragment is 15 mm. long 
with 7 joints, the first very short, the second about as long as broad, 
the third about three times as long as broad, and the remainder about 
four times as long as broad; the first two joints are practically round 
In cross-section, the third and following becoming laterally com- 
pressed ; the joints are oblong with the distal ends nearly straight. 
Nine rays, each with an undivided arm; radials even with the 
edge of the centro-dorsal; first brachials about twice as broad as long, 
closely united in their posterior half, but widely free anteriorly, leav- 
ing a large U-shaped gap extending down between the anterior halves 
of adjacent first brachials; second brachial trapezoidal, half again 
as broad anteriorly as posteriorly, the sides concave; second brachial 
nearly twice as broad as long, the anterior and posterior edges equal 
to the anterior edge of the first brachial in length, the lateral edges 
strongly concave; the long axis of its posterior face is at right angles 
to the median plane of the arm, but the long axis of its anterior face 
is turned nearly 45°; the fourth and fifth brachials constitute the 
first syzygial pair, which is about as long as its greatest diameter, 
and strongly concave laterally; the long axes of its anterior and 
