NO. 1820 RECENT CRINOIDS FROM PHILIPPINES — CEARK 211 



Genus EUDIOCRINUS P. H. Carpenter 

 EUDIOCRINUS SERRIPINNA, new species 



Centro-dorsal discoidal, the rather broad dorsal area flat. 



Cirri xix, 12-14, 5 mm. to 7 mm. long, arranged in a partially 

 double marginal row; first joint short, second squarish, third, fourth, 

 and fifth about half as long again as broad basally, the terminal five 

 or six squarish ; second and following with expanded distal ends, 

 this character dying away distally ; cirri rounded basally, but becom- 

 ing compressed distally, the distal portion consequently appearing 

 broader in lateral view; opposing spine prominent, central in posi- 

 tion, not reaching half the diameter of the penultimate joint in. 

 height ; terminal claw longer than the penultimate joint, abruptly 

 curved basally. 



The arms are as in the other species of the genus, except that the 

 brachials are rather more strongly overlapping, the carination, which 

 is very slight, is single instead of double, and the syzygies occur at 

 intervals of three oblique muscular articulations ; the surface of the 

 joints is finely granulated, as in B. granulatus. 



The proportions of the pinnules are as in the other species, but the 

 lower pinnules, and especially those which are enlarged, have the 

 distal ends on the dorsal side very strongly produced, giving them 

 a strongly serrate profile. 



The strongly serrate condition of the lower pinnules distinguish 

 this species at once from the other three species of the genus ; the 

 single carination of the dorsal surface of the arms is also unique, 

 while the small number of the cirrus joints differentiate it sharply 

 from E. indivisiis and B. granulatus. 



In Professor Bell's description of B. granulatus, he uses "first" 

 and "second" pinnule in the sense of the two first pinnules on the 

 same side of the arm, while Professor Semper uses the same terms 

 strictly, taking the pinnules alternately in order of sequence ; hence 

 Professor Bell finds a great difference between the "first" and "sec- 

 ond" pinnules of his B. granulatus, and those of B. indivisus, which, 

 in reality, is non-existent. , 



Measurements. — Arms about 40 mm., cirri 5 mm. to 7 mm. long. 



Color (in spirits). — Yellowish brown, the cirri lighter, the peri- 

 some darker. 



Type.— Cat. No. 25437, U. S. N. M., from Albatross Station No. 

 5136; off Jolo town; 22 fathoms. 



