A. H. CLARK : THE CRINOIDS OF THE INDIAN OCEAN. 325 



have high carinate processes involving the distal third or half of the median 

 dorsal line ; P.^ is 7 mm. long with fourteen segments, which in the outer part 

 are rather longer than is usual in typical 0. serripinna ; the processes in the 

 middorsal line are much longer and larger than in the typical form, after the 

 first four or five segments being a high uniform carination of the whole outer 

 edge of the segment of which the crest is parallel with the longitudinal axis 

 of the pinnule, and in the outer six or seven, though not involving so much 

 of the segment, bifurcated; the ventrolateral edges of the pinnulars are as in 

 typical 0. serripinna. The following pinnules have the distal edges of the 

 segments beyond the second greatly produced, especially in the middorsal 

 line, this production in lateral view appearing like long overlapping spines 

 such as are seen in the distal part of the arms of the species of Asterometra or of 

 Stylometra. The distal pinnules, so far as they are preserved, do not appear 

 to difiEer in any way from those of typical 0. serripinna. 



The size of this variety is the same as that of typical 0. serripinna. 



Locality. — Northeastern Ceylon; Entrance to Palk Straits, Point Pedro 

 hearing S8E., distant about three miles; 6 — 8 fathoms; sandy bottom. — -Eighteen 

 specimens. 



NOT IDENTIFIABLE. 



Localities. — .V. Cheduba; 10 fathoms (One specimen). — 6^ 01' N. lat., 

 81° 16' E. long. ; 34 fathoms (One specimen). — Arrakan Coast (One specimen). — 

 Andaman Islands (One specimen), — (1) India (Three specimens). 



Baptist Mission Press, Calcutta. 



