A. H. CLARK: THE CRINOIDS OF THE INDIAN OCEAN. 219 



less stout basally and not tapering so rapidly; P.^ 13 mm. long with about thirty 

 segments, about as stout basally as the preceding pinnules but tapering much 

 more gradually, the first eight segments about three times as broad as long, then 

 gradually becoming longer, and squarish about the eighteenth, and in the ter- 

 minal portion longer than broad; P3 about 15 mm. long, and P^ 16mm. or 17mm. 

 long, resembling P.^ ; Pj similar, 1 3 mm. long ; P, similar, and of the same length ; 

 P, and the following pinnules 12 mm. long, with the segments in the proximal two 

 thirds slightly expanded laterally ; in the course of the next four or five the pin- 

 nules decrease in length to 8 mm. , while the expansion of the segments becomes 

 more pronounced, beginning on the second, reaching a maximum on the fourth or 

 fifth, then gradually dying away distally ; distal pinnules stout, as in the other 

 species of the genus, 10 mm. long. 



The colour in spirits is yellowish brown. 



Locality. — Malay Archipelago. 



Depth. — 30 fathoms. — One specimen. 



PACHYLOMETRA LUNA. 

 Pachylometra lima 1911. A. H. Clark, Proc. U. S. Nat. Mus., vol. 39, p. 556. 

 Habitat. — Philippine Islands. 

 Depth. — -224 fathoms. 



PACHYLOMETRA SELENE. 

 Pachylometra selene 1911. A. H. Clark, Proc. U. S. Nat. Mus., vol. 39, p. 556. 

 Habitat. — Philippine Islands. 

 Depth. — 230 fathoms. 



PACHYLOMETRA FLEXILIS. 



Antexion flexilis 1888. P. H. Carpenter " Challenger " Reports, vol. 26, Zoo- 

 logy, p. 217, pi. xhi 



Pachylometra flexilis 1909. A. H. Clark, Proc. Biol. Soc. Washington, vol. 22, 

 p. 21. 

 . Habitat. — Ki Islands. 

 Depth. — 140 fathoms. 



PACHYLOMETRA PATULA. 



Antedon patula ISSS. P. H. Carpenter, '' Challenger" Reports, vol. 26, Zoo- 

 logy, p. 219, pi. xliii. 



Pachylometra patula 1909. A. H. Clark, Proc. Biol. Soc. Washington, vol 22, 

 p. 21. 



Habitat. — Ki Islands ; Sahui Bank ; Philippine Islands. 

 Depth. — 58-140 fathoms. 



