NO. 1820 RECENT CRINOIDS FROM PHILIPPINES — CLARK 213 



the remainder slightly longer than broad ; the second, third, and 

 fourth joints are somewhat carinate; third brachial pinnule 8 mm. 

 long, small and weak, wath about 20 joints, those in the proximal 

 half squarish, those in the distal slightly longer than broad, the sec- 

 ond to the sixth rather strongly carinate; succeeding pinnules de- 

 creasing rapidly in length, the fifth and following being 5 mm. long, 

 then slowly increasing again and reaching a length of 9 mm. distally. 



Measurements. — Arms, 120 mm., cirri 45 mm. in length. 



Color (in spirits). — Brown. 



Type. — Cat. No. 25438, U. S. N. M., from Albatross Station No. 

 5146; west of Tapul Island (south of Jolo) ; 24 fathoms. 



Another similar specimen was obtained at Station No. 5147; off 

 Balinpongpong Island (south of Jolo) ; 21 fathoms. 



This species agrees with H. erassipinna in the general scheme of 

 its arm division and in the shortness and strong overlapping of the 

 projecting distal ends of the brachials; the distichals are 4 (3 + 4), 

 the palmars 4 (3 + 4) externally, 2 internally; the post-palmars, 

 wdiich are developed on the inner side of the inner palmar series of 

 each distichium only are 4 (3 + 4) ; each distichium divides once 

 externally and twice internally, which would make fifty arms in all ; 

 the type specimen has fifty-one. The comparatively slender lower 

 pinnules, which become delicate and flagellate distally preclude any 

 possibility of confusion with H. erassipinna. 



HIMEROMETRA ROBUSTIPINNA, new species 



This new form agrees in its general appearance and in its arm 

 structure with H. erassipinna, but the cirri, while containing the 

 same number of joints, are without dorsal spines, though the last 

 three joints may have small central tubercles (in H. erassipinna 

 strong dorsal spines are developed in the outer third or even half of 

 the cirri), and the lower pinnules, though with the same number of 

 component joints, are much stouter, with most of the joints broader 

 than long, and smooth, without the prominent projecting spinous 

 distal ends characteristic of the joints of the proximal pinnules of 

 H. erassipinna. 



The type has 37 arms 100 mm. long, and t8 cirri 35 mm. long; 

 the distichal pinnule is 15 mm. long. 



Color (in spirits). — Dull violet. 



Type.— Cdit. No. 25439, U. S. N. M., from Albatross Station No. 

 5165; south of San Gasanga (Tataan group) ; 9 fathoms. 



