228 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. XXXIV. 
of their edges, especially the lateral edges; but the proximal and dis- 
tal edges as yet have not taken on the characteristic crenulate charac- 
ter of those of the adults. The basal broadening of the arms of this 
species reminds one of the same character seen in the arms of Rhizo- 
crinus. This specimen is peculiar in having on one ray a regenerat- 
ing pair of arms in the place of a single arm lost, the distichals being 
2, thus making 11 arms in all; no specimen with more than 10 arms 
has heretofore been observed in this group of the genus. 
The smallest specimen has the entire radials visible; these have a 
pronounced rounded median ridge; the ends of the basal rays are 
prominent, and project rather more than in the preceding specimen. 
The broadness of the costals and lower brachials is marked, even at 
this early stage, though the succeeding brachials are much elon- 
gated; the eversion of the lateral edges of the costals and lower 
brachials is already apparent. 
Charitometra lateralis belongs to the same division of the genus 
as C. tuberosa from the Philippines and C@. lata from Japan; it 
differs from both in its larger size, much longer cirrus joints, which 
are about half again as long as wide instead of squarish, and the 
prominent eversion of the lateral edges of the costals and lower 
brachials, and the absence of the dorsal carination of the lower part 
of the arms, which is so characteristic a feature of C. tuberosa. 
DISTRIBUTION OF THE SPECIES BY STATIONS. 
Station No. 3476. 
Kaiwi channel; 351 fathoms. 
Thalassometra hawaiensis. 
Station No. 3476.—Kaiw?i channel; 298 fathoms. 
Thalassometra hawaiiensis. 
Station No. 3859.—Between Molokai and Maui; 138-140 fathoms. 
Trichometra vexator. 
Station No. 3865.—(Same locality) ; 256-283 fathoms. 
Trichometra vexator. 
Station No. 3882.—(Same locality) ; 186 fathoms. 
Thalassometra crassicirra. 
Station No. 3883.— (Same locality) ; 277-284 fathoms. 
Trichometra vexator. 
Station No. 3887,—North coast of Molokai; 552-809 fathoms. 
Atelecrinus conifer. 
Station No. 3910.—South coast of Oahu; 311-837 fathoms. 
Trichometra vexator. 
Station No. 3925.—(Same locality) ; 323-299 fathoms. 
Trichometra vexator. 
Station No. 3938.— Off Laysan Island; 148-163 fathoms. 
Lridometra crispa. 
