NO. 1G91. SEVENTEEN NEW SPECIES OP CRINOIDS— CLARK. 639 



as Avell as the first two joints of the first throe pinnules, in close appo- 

 sition and sharply flattened, the lateral edi2:es somewhat j)roduced. 



Eleven arms (in the type), 40 nun. long; first two brachials sub- 

 equal, wedge-shaped, about twice as broad as the exterior length, the 

 first interiorly united; third and fourth (sy/ygial paii') slightly 

 longer interiorly than exteriorly, nearly three times as broad as the 

 interior length; next four brachials oblong, nearly four times as 

 broad as long, then becoming almost triangular, about three times as 

 broad as long, then gradually lengthening (though remaining almost 

 triangular) to about twice as broad as long, and at a point somewhat 

 beyond the end of the proximal third rather quickly becoming wedge- 

 shaped, almost oblong, about two and one-half times as broad as long. 

 From about the ninth onward the brachials have prominent distal 

 ends, though they do not overlap the bases of the succeeding joints. 

 Syzygies occur betAveen the third and fourth, ninth and tenth, and 

 fifteenth and sixteenth brachials (the second sometimes omitted), antl 

 distally at intervals of seven to ten oblicpie muscular articulations, 



Pd 4.5 mm. long, moderately stout basally, but tapering rapidly 

 in the proximal half, and slender distally, with 20 joints, at first about 

 twice as broad as long, becoming squarish after the eighth; the second 

 to the seventh joints are rather strongly carinate; P^ similar, very 

 slightly longer and stouter; Po G mm. long, considerably stouter and 

 stiffer than the preceding, and rather more strongly carinate basally, 

 with about 20 joints, the first 7 (except for the carinate processes) 

 squarish, the remainder slightly longer than broad, becoming about 

 half again as long as broad distally; the ridge in the distal half of 

 the outer side is but little marked ; Pg 3 mm. long, much smaller than 

 any of the preceding, with about 12 joints, at first broad, becoming 

 squarish about the fifth, and nearly twice as long as broad distally ; 

 the second-fifth joints are carinate; following pinnules similar and 

 about the same length, the joints becoming gradually longer and 

 the basal carination gradually less ; distal pinnules, 5 mm. long. On 

 the arms arising from a IBr axillary, P^, Pj, and Pg are usually as 

 described for Pd, Pi, and Po, and P^ is much smaller, as described 

 for Pg ; but occasionally Pj is enlarged and similar to Pg, as described, 

 instead of being small like P^. 



Type-specimen. — Cat. No. 7A, Indian Museum; southern por- 

 tion of Malacca Strait. 



Genus STEPHANOMETRA A. H. Clark. 



STEPHANOMETRA CORONATA, new species. 



This species is most closely related to S. tenuipinna. 



Cirri XXII-XXIII, 25-30, 22 mm. long, resembling those of 

 S. teimipimia,' the longest joints are about one-third longer than 

 broad; the ninth, tenth, or eleventh is a well-marked transition joint. 



