No. 1608.] NEW SPECIES OF CRINOIDS—CLARK. 935 
first costals short, concave anteriorly, but with a straight posterior 
border, over twice as broad as its lateral and over three times as broad 
as its median length; costal axillaries practically square, the sides 
very little curved; costals and first two brachials flattened laterally 
and in close apposition. Ten arms about 25 mm. long; first brachial 
short, longer outwardly than inwardly, the anterior edge concave; 
second brachial about twice as large, irregularly quadrate; third and 
fourth brachials (syzygial pair) somewhat longer than broad, the 
epizygal oblong, the hypozygal wedge-shaped or almost triangular, 
the longer side in; following brachials squarish, after the ninth be- 
coming wedge-shaped, longer than wide, and more elongate distally ; 
all the brachials have a more or less concave surface, this becoming 
more marked after the ninth, when the distal edges begin to project 
somewhat. Syzygia occur between the third and fourth, ninth and 
tenth, and fourteenth and fifteenth brachials, and distally at intervals 
of three or four bifascial articulations. 
First pinnule long, filiform, with 11 joints, the first 2 squarish, then 
becoming rapidly elongate, the distal being exceedingly long and 
slender; the distal pinnules have the first jomt wedge-shaped or 
almost crescentic, broader than long, the second wedge-shaped, longer 
than broad, and the following becoming progressively elongated. 
The comparatively short cirrus joints of this species, especially the 
second, which is hardly more than squarish, distinguish this species at 
once from the others in which the cirri are known; the large number 
of cirri and the comparative shortness of the interradial processes of 
the radials differentiate it at once from Bathymetra carpenteri. 
Type. Cat. No. 22672, U.S.N.M.; from Albatross Station No. 
4766; western Bering Sea; 1766 fathoms. 
BATHYMETRA CARPENTERI, new species. 
1888. Antedon abyssicola P. H. CARPENTER, Challenger Reports, XXVI, 
Zoology, pl. Xxxiit, fig. 2 (not fig. 1), and p. 191 (part). 
The name carpenteri is here conferred upon the form obtained by 
the Challenger west of Tasmania, and referred to abyssicola by Doc- 
tor Carpenter. The difference between the two forms is so very con- 
siderable that 1t does not seem desirable to include them both under 
the same specific name, at any rate until intergradation shall have 
been proven. In Bathymetra carpenteri the centro-dorsal is low, sub- 
conical, about half as high as broad, the cirrus sockets distributed 
about its margin, and the outline of the calyx and lower part of the 
arms is rounded, much as in Antedon or Heliometra, whereas in B. 
abyssicola the centro-dorsal is about as long as wide, bearing cirri 
only about the dorsal pole, the basal half or more of the centro-dorsal 
being smooth, and the calyx is long and slender, with a small angle of 
divergence, as in Charitometra incisa or C. basicurva. 
