NO. 1608.] NEW SPECIES OF CRINOIDS—CLARK. 213 
trocrinus), one North Pacific genus (Psathyrometra), and three 
genera (Atelecrinus; Thalassometra; Charitometra) of exceedingly 
wide distribution; of the six species belonging to the three last, four 
are of a generalized type, while two, Vhalassometra fisheri and Chari- 
tometra lateralis show Indo-Japanese affinities. In other words, it is 
tropical oceanic, that 1s, composed of genera which are certain to be 
found in all tropical or subtropical isolated islands, with a shght 
West Indian and somewhat stronger Indo-Japanese tinge. As might 
be expected from the isolated condition of the islands, and the great 
distance separating them from any locality of which we have a clear 
idea of the crinoid fauna, all the species are new; but, rather oddly, 
there are no new genera. 
It is perhaps well to call attention to the fact that species have been 
recorded from the Hawaiian Islands, and specimens exist in collec- 
tions so labeled, belonging to the Comasteridxe and Himerometride ; 
these have probably been brought as curios to Hondlulu from Japan 
or Samoa and then sold as having been obtained in the Hawaiian 
Islands; did these families really occur, I am sure they would not 
have escaped such energetic collectors as the scientific staff of the 
Albatross. 
KEY TO THE CRINOIDS OF THE HAWAIIAN ISLANDS.@ 
a. Basals present, forming a narrow band between the radials and the long 
conical ecentro-dorsal; no pinnules on the lowest 12 brachials. 
Atelecrinus conifer. 
a’. Radials resting directly upon the centro-dorsal; the second brachial, and 
all following, bear pinnules. 
b. Nine radials, giving rise to nine undivided arms__Decametrocrinus rugosus. 
b’. Five radials, giving rise to arms which divide at least once. 
ce. Ambulacra of arms and pinnules naked. 
d. Centro-dorsal low, the cirri without definite arrangement; yellow or 
brownish; small. 
e. 25-45 cirrus joints; first pinnule greatly elongated and extremely 
SLCC Care eee ears hemes Seem Sek DEO SIA Ee dd Trichometra veaator. 
e’. 10 or 12 cirrus joints; first pinnule only slightly longer than the 
SCCO 11 GE ey Pen ee es A Ne De ee Beet Ue SEN Tridometra crispa. 
d’. Centro-dorsal long and conical, the cirri in definite columns; red or 
purple. 
e. Cirri in 15 columns; calyx spiny; proximal cirrus joints elongated, 
Cisiall Sor, aml Golly a Zenometra triserialis. 
e’. Cirri in 20 columns; calyx smooth; all the cirrus joints greatly 
elongated, the distal without spines______ Psathyrometra congesta. 
ce’. Ambulacra of arms and pinnules protected by large covering-plates. 
d. First pinnule larger and stouter than its successors; genital pinnules 
not expanded; distal cirrus joints very short and spiny. 
*This key is not adapted to any but Hawaiian species. 
