A. H. CLARK : THE CRINOIDS OF THE INDIAN OCEAN. 257 



oblique muscular artir-ulations, the interval being long in the proximal and sliort 

 in the distal part of the arm. 



The pinnule.s are in general like those of Hi/ixilocrimis naresianus. 



The colour in life is recorded as ■■ stalks dark olive green, crown reddish at 

 base of arms with green sub-tint, becoming deep olive green at the arm tips." 



Localities.— iVo»</t of the Laccadive Islands (13° 47' 49" N. lat., 73° 07' 00" 

 E. long.) ; 636 fathoms (Type Locahty). — Two broken specimens. 



West of Goa (15° 29' N. lat., 72° 41' E. long.) ; 559 /ai/«o»?s.— One broken 

 specimen. 



Andaman Islands S miles south of Cinguei ; 500 fathoms. — One specimen 

 with seventeen arms ; four of the IIBr series are 2, and two are 4 (3-|-4); the 

 single IIIBr series is 4 (3+4). 



COMASTROCRINUS ORNATUS. 

 Hypalocrinus ornatus 1909. A. H. Clark, Proc. U. S. Nat. Mus., vol. 36, p. 651. 



Description. — In general like C. springeri, but a smaller and more delicate 

 species. 



Stem as in C. springeri, but only 3 mm. in diameter; cirri proportionately 

 more slender, 30 mm. long (ten times the stem diameter) with forty segments, 

 the dorsal tubercles commencing at about the seventeenth ; basals as in Isocrinus 

 decorus, without ornamentation; radials without 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. 



The colour in spirits is white. 



Localities. — Amlaman Sea ; 200 fathoms (Type Locality). — One specimen. 

 Near the Pedro Shoal (13° 47' 49" N. lat., 73° 07' 00" E. long.); 636 

 fathoms. — Four specimens. 



COMASTROCRINUS LILIAOEUS. 



Hypalocrinus liliaceus 1909. A. H. Clark, Proc. Biol. Soc. Washington, vol. 22, 

 p. 150. 



Description. — This species is closely related to C. springeri ■ the internodals 

 are usually from twelve to fourteen in number; the IIBr are 4 (3 + 4), more 

 rarely 2 ; the IIIBr are 3 (2+ 3) ; the elements of the division series and the lower 

 brachials are not strongly everted as in C. springeri, but are rather prominently 

 overlapping, this overlap forming a rather sharp point on the side of the brachial 

 which bears the pinnule ; this character gradually dies away after the proximal 

 third of the arm, disappearing almost entirely in the outer half. The first 

 syzygy occurs between the second and third brachials as in Capillaster, and the 

 first brachial bears a pinnule. 



