76 Clark — New Recent Crinoids from the Indian Ocean. 



Ceiitro-dorsal a thin disk, the bare flat dorsal pole 1 mm. in diameter; 

 cirrus sockets arranged in a single marginal row. 



Cirri xii, 12, 5 mm. long; first two joints twice as broad as long, third 

 half again as l)road as long, fourth twice as long as broad ; following joints 

 very gradually decreasing in length, tiie antepenultimate l:)eing about one- 

 third again as long as broad; third and fourth joints strongly " dice-ljox 

 shaped," fifth and sixth sliglitly so, the following with i)nictically straiglit 

 edges; cirri proximally almost rcjund in cross-section, after the fifth joint 

 becoming laterally compressed, and therefore l)roader in lateral view; no 

 dorsal spines or projections ; opposing spine median, small, scarcely equal- 

 ing one-fourth tlie diameter of the peiuiltiniate joint in height. 



Arms and pinnules as in Eudiocrinus oriiatus, the overlappiiig of the 

 brachials and pinnulars being moderately marked; arms 15 mm. long. 



Color (in spirits). — White. 



Family HIMEROMETRID.E. 



Genus DICHKOMETRA A. H. Clark. 

 Dichrotnetra aranea sp. nov. 



Type.— Cat. No. ^V^ Indian Museum, from 8° 51^ .30'^ N. lat., 81° IK 

 52^' E. long. ; 28 fathoms. 



This new form is nearest to D. finschii from New Britain ; it differs from 

 thatspecies in having somewhat fewer cirrus joints (o;>-6(i), and in having 

 Ps nearly or quite as long as P2, while the joints in the distal portion of the 

 proximal pinnules are much elongated, instead of subequal, slightly longer 

 than broad as in finschii. The lower pinnules are comparatively slender, 

 Vjut sliglitly stiffened; P2 is about as stout as Pi, and 2 mm. longer. 



Color (in spirits). — Light brownish yellow. 



Genus CYLLOMETRA A. II. Clark. 



Cyllometra mollis sj). nov. 



Type. — Cat. No. 15F, Indian Museum, labeled, with a question mark, 

 Kurrachi. 



Centro-dorsal discoidal, thin, the polar area flat, 2 mm. in diameter; 

 cirrus sockets arranged in one and a more or less partial second crowded 

 row. 



Cirri xx, 20-22, 10 mm. long; first joint short, second and third about 

 twice as broad as long, the remainder very slightly broader than long 

 becoming almost squarish on the terminal five or six; second and fol- 

 lowing joints with the distal dorsal edge produced and finely spinous, this 

 projection progressively narrowing distally, at the same time very slowly 

 moving to a more i)roximal po.sition, after al)out the eighth becoming a 

 pair of small subterminal tubercles, which on the last five to seven joints 

 give i)lace to small median tubercles; opposing spine much larger than 

 the spines on the precetHng joints, triangular, the a})ex terminal to nearly 

 median, in height reaching to one-half or rather more of the diameter of 

 . the penultimate joint; terminal claw very slightly longer than the penul- 



