218 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. XXXIV. 
the third and followin bearing genital glands; the second pinnule 
has much elongated joints, but those of the third and following pin- 
nules are not especially long. 
Color (in spirits).—White; yellow in life (Fisher). 
_ Localities —Albatross Station No. 3859.—Mokuhooniki Islet bear- 
ing N. 18° EK. 5.6 miles distant (Pailolo channel, between Molokai 
and Maui) ; 138-140 fathoms; fine sand and mud. 
Arm fragments. 
Station No. 3865.—Mokuhooniki Islet bearing S. 79° W. 6.9 miles 
distant (same locality) ; 256-283 fathoms; fine volcanic sand and 
rock. 
Twenty-one specimens. 
Station No. 3883. Snr pieahoowiter Islet bearing 8. 80° 30’ W. 7.8 
miles distant (same locality) ; 277-284 fathoms; globigerina ooze. 
Ten specimens. 
Station No, 3910.—Diamond Head Light bearing N. 7° E. 12.5 
miles distant (south coast of Oahu, near Honolulu) ; 311-837 fathoms; 
fine gray sand and mud. 
Five specimens. 
Station, No. 3925.—Diamond Head Light bearing N. 29° 30’ E. 
10.2 miles distant; 323-299 fathoms; fine gray sand, mud, and rocks. 
Two specimens. 
Type.—Cat. No. 22691, U.S.N.M., from this station. 
Station No. 4105.—WLae-o Ka Laau Light, Molokai Island, bearing 
S. 45° 30’ E. 10.6 miles distant; 314-355 fathoms; fine coral sand 
and foraminifera. 
Six specimens. 
Remarks.—This species 1s very similar in general appearance to 7. 
aspera of the coast of Florida, but it may be at once distinguished by 
the lack of the everted and spinous ends of the brachials from which 
T. aspera gets its name. 
Genus [RIDOMETRA. 
IRIDOMETRA CRISPA, new species. 
Centro-dorsal hemispherical, bearing about 70 cirri without definite 
arrangement. 
Cirri 4 mm. long with 10 to 12 joints, the first short, the remainder 
longer than broad, the third, fourth and fifth being the longest; the 
opposing spine is represented by a small tubercle. 
Radials almost concealed; first costals short, narrowing rapidly | 
anteriorly, and very deeply incised in the median line; they are 
rounded dorsally and widely separated; costal axillaries about as 
long as broad, all the sides concave, much produced posteriorly. Ten 
arms about 30 mm. long, resembling those of other species of the 
genus, as J. parvicirra or 1. minuta. 
