NO. 1691. SEVENTEEX NEW SPECIES OF CRICOIDS— CLARK. 551 



and in 11. naresianiis; first brachial ver}^ obliquely wedge-shaped, the 

 distal edges forming a straight line with those of adjacent first 

 brachials, and standing out in a high scalloped vertical ridge or bear- 

 ing two or throe high tubercles, the intei-ior edges entirely united; 

 .second brachial smaller, wedge-shaped, about twice as long out- 

 wardly as inwardly, the distal ed^e everted as in the preceding; 

 following brachials obliquely wedge-shaped, about twice as broad as 

 long, after about the tw^elfth becoming oblong, at first half again as 

 broad as long, gradually increasing in length, after about the middle 

 of the arm being about as long as broad, and in the terminal portion 

 half again as long as broad ; the great eversion of the brachials 

 gradually dies away as the joints become oblong, giving place to a 

 slight prominence of the distal edge of the brachials, which in the 

 terminal portion of the arm becomes a rather strong overlap. 

 Syzygies occur between the second and third or third and fourth 

 brachials (more rarely between the fourth and fifth), again between 

 the fifteenth and sixteenth to thirty-first and thirty-second (usually 

 in the vicinity of the twentieth), and distally at intervals of from 

 four to nineteen oblique muscular articulations, the interval being 

 long in the proximal, short in the distal part of the arm. 



The pinnules are in general like those of H. 7iaresianus. 



Tyfe-specimen. — Cat. No. - -^- , Indian Museum; lat. 13° 47' 49" 

 K, long. 73° 07' 00" E. ; 636 fathoms. 



Cotype.—Cat. No. 25487, U.S.N.M.; from the same locality. 



This species is dedicated to Mr. Frank Springer, the eminent 

 authority on the Crinoidea. 



HYPALOCRINUS ORNATUS, new species. 



In general like II. f^pringet'l^ but a smaller and more delicate 

 species. 



Stem as in H. spritigeri, but only 3 mm. in diameter; cirri propor- 

 tionately more slender, 30 mm. long (ten times the stem diameter) 

 with 40 joints, the dorsal tubercles commencing at about the seven- 

 teenth ; basals as in Isoerinus decorus, without ornamentation ; radials 

 without dorsal ornamentation, but with the distal edges everted and 

 produced into a high, thin, scalloped overlapping ridge; IIBr 4 

 (3+4). 



Eighteen to twenty arms, about 95 mm. long from the radials. 



Type-specimen. — Cat. No. ^V^, Indian Museum; Andaman Sea; 

 200 fathoms. 



Cotype. — Cat. No. 25488, U.S.N.M. ; from the same locality. 



