146 Clark — New Recent Indian Crinoids. 



slender, especially the cirri. It may at once be distinguished from all the 

 other species of the genus by tlie paired dorsal tubercles on the cirrus 

 joints which are small and situated very close together; and l)y tiie short- 

 ness and comparative slenderness of P2, which is very slightly, when at 

 all, longer than Pi; P2 also has comparatively few joints, these number- 

 ing less than twenty. 



Cenometra insueta sp. nov. 



Type. — Cat. No. 23H., Indian Museum ; Arrakan coast, Burma. 



With the arm and ])inmde structure of the preceding, and the same 

 slenderness of build, this form has the paired dorsal tubercles of the cirrus 

 joints situated with their apices much further apart, about two-thirds the 

 transverse diameter of the joint faces instead of less than one-half as in 

 C. herdmani. 



Genus CYLL0METR.\ A. H. Clark. 



Cyllometra soluta sp. nov. 



Type. — In collection of Indian IMuseum ; Straits of Ormnz, at entrance 

 to Persian Gulf; -lS-49 fathoms. 



This species in its general appearance resembles C. manca from the 

 Philippine Islands. 



Centro-dorsal thin-discoidal, the bare polar area 2 mm. in diameter. 



Cirri xvi, 21-28, 11 mm. to 13 mm. long, tlie fourth or fifth and follow- 

 ing joints subequal, about as long as broad ; third or fourth and following 

 joints with produced distal ends, which soon transform into prominent 

 paired dorsal spines, becoming single median dorsal spines on the termi- 

 nal five or six. 



Ray and arm structure as in C. mnnca and C. albopurp-nrra. 



Fourteen to sixteen arms 55 mm. long. 



Pa absent; Pi small and very slender, 3 mm. long, with about twelve 

 joints ; Pa the largest and longest on the arm, 11 mm. long with seventeen 

 joints, tlie first not so long as broad, the third twice as long as broad, the 

 reniaiiiiler alxmt three times as long as broad; the pinnule is much more 

 slender than the corresponding pinnule in the other species of the genus, 

 and is nearly smooth, the distal edges of the joints in the terminal por- 

 tion projecting only very slightly; Pa 7 nun. long, similar to P2 but very 

 slender, the joints distally i)rojiortionate]y somewhat longer; following 

 pinnules more slendiT still, about 5 mm. long with fifteen joints, and 

 flexible, gradually decreasing in length to 4 mm. and increasing again to 

 8 mm. distally. 



Family TROPIOMETRIDJ]:. 

 Genus ASTEROMKTHA A. H. Clark. 

 Asterometra mirifica sp. nov. 



Antedua lonyicirra (part) (not of Carpenter) 1803. Bei.i., Journ. Linii. 

 Soc. (Zool.) vol. 24, p. 339. 

 Type.— Cat. No. ** V, Indian Museum; Sahul Bank, in 10° 30^ S. lat., 

 125° E. long. 



