210 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 52 



Syzygies occur between the third and fourth brachials, again be- 

 tween the thirteenth and fourteenth to seventeenth and eighteenth 

 (rarely an additional one between the ninth and tenth), and distally 

 at intervals of three to thirteen (usually six or eight) oblique mus- 

 cular articulations. The second and following brachials have pro- 

 jecting and finely spinous distal edges, making the arm character- 

 istically rough. 



Proximal pinnules very slender and flagellate; first pinnule 15 

 mm. to 20 mm. long, very delicate, with about 60 joints, the first 

 five of which are broad and are provided with a dorsal carinate 

 process, the . remainder squarish ; second pinnule longer, about 

 22 mm. in length, with the same number of joints, but slightly 

 stouter; first five joints modified as in the first pinnule, the remainder 

 squarish; third pinnule similar to the second and about the same 

 length; following pinnules decreasing gradually in length, in basal 

 stoutness, and in the number of component joints, the sixth being 

 12 mm. long with 30 joints, of which those in the proximal third are 

 similar to the corresponding joints of the second and third pinnules, 

 those in the distal portion being longer than broad, becoming ter- 

 minally about twice as long as broad; twelfth pinnule 8 mm. long, 

 wdth about 20 joints, the first two not quite so long as broad, the 

 third and fourth squarish, the remainder becoming progressively 

 elongated, and about twice as long and broad distally; distal pin- 

 nules very slender, 9 mm. long, with about 30 joints, the first wedge- 

 shaped, not so long as broad, the second trapezoidal, about as long 

 as its greater diameter, the third longer than broad, the remainder 

 about twice as long as broad. The pinnule joints have slightly pro- 

 jecting and very finely spinous distal ends. 



Measurements. — Arms 140 mm., cirri 30 mm. to 35 mm. in length. 



Color (in spirits). — Red brown, the cirri yellow brow^n ; in life 

 apparently bright yellow with regular bands of bright red on the 

 arms, like C. ruhroUava. 



Type.— Cat. No. 25436, U. S. N. M., from Albatross Station No. 

 5137; off the town of Jolo; 20 fathoms. 



This species was also found at Station No. 5139; between Jolo 

 and Pangasinan Island ; 20 fathoms. 



This fine species resembles C. rubroHava in the knobby character 

 of the cirri and the roughness of the arms ; but the cirri are very 

 much longer than in that species, while the arms are from forty to 

 eighty in number as compared with a maximum of thirteen in C. 

 rubroHava; moreover, the distichal series in C. rubroflava, as in all 

 of the recent Zygometridse previously known, are 4 (3 + 4). while 

 in the present species they are 2. 



