NO. 1608. ] NEW SPECIES OF CRINOIDS—CLARK. ONS) 
Remarks.—This species is related to Thalassometra compressa of 
the Philippines and 7’. orion of southern Japan, but is at once dis- 
tinguished by the prominent dorsal spines on the cirri, the greater 
number of cirrus-joints, and the greater proportionate length of the 
cirri, and the flatness and strong carination of the middle and distal 
pinnules. 
In the lists of species belonging to.the two genera published when 
T established Thalassometra and Charitometra, orion and compressa 
were erroneously assigned to the latter. Porrecta and flava, of whose 
position I was at the time uncertain, also belong to 7halassometra. 
I take great pleasure in associating with this interesting species 
the name of my friend Mr. Walter K. Fisher, of Stanford University, 
California. 
THALASSOMETRA CRASSICIRRA, new species. 
This species in its general appearance and proportions resembles 
T. gigantea, but it differs in having exactly 20 arms, all the distichals 
being 2, and in having the costals, distichals, and first 7 brachials 
perfectly smooth, without spines, in close apposition and sharply 
‘“wall-sided.” ‘The cirri are stout, and resemble those of 7. gigantea, 
having approximately the same number of joints. The arms are 
about 120 mm. long. 
Color (in spirits)—Light orange brown, the costals, distichals, 
and first four brachials dark brown. 
Localities.—A lbatross Station No. 3882; Mokuhooniki Islet bearing 
N. 30° W., 3.1 miles distant (Pailolo channel, between Maui and 
Molokai) ; 136 fathoms; sand, coral, and rock. 
One specimen. . 
Type.—Cat. No. 22689, U.S.N.M., from this station. 
Station No. 4107.—Lae-o Ka Laau Light, Molokai Island, bear- 
ing §. 34° 30’ E., 12.3 miles distant; 350-355 fathoms; coral, sand, 
and foraminifera. 
One small ten-armed specimen. 
Remarks.—The absence of palmars and the stout cirri with a com- 
paratively large number of joints distinguish this form from the 
only other * bidistichate ” species of the genus occurring in the Ha- 
wallan Islands. 
THALASSOMETRA DELICATA, new species. 
Centro-dorsal small, conical, bearing 10 columns of cirrus sockets, 
2 to a column, the 2 columns in each radial area separated by a more 
or less pronounced radial ridge. 
Cirri 25 mm. to 30 mm. long of about 40 joints, the first 3 short, the 
fourth squarish, the following to the sixteenth about half again as 
long as wide, perfectly smooth, the surface dull; remaining joints 
IPiRoe IN, IMG Wolk, sororxihy—O—— 1} 
