22 Clark — A Revision of Tlmlassometridss and Himerometridee. 



short, the remainder about one-third longer than broad, remarkably imi- 

 form ; later joints somewhat earinatedorsally ; opposing spine very small, 

 terminally situated. 



Ends of Ijasal rays concealed or more or less prominent in the interra- 

 dial angles; radials visible all around, moderately long; i Br short and 

 broad, in close apposition and sharply flattened laterally, with low elon- 

 gated median tul^ercles on each joint ; ii Br 2, rarely present ; first nine or 

 ten brachials short, discoidal or wedge-shaped, over twice as broad as long, 

 then l)ecoming obliquely wedge-shaped or triangular, as long as broad, 

 gradually becoming wedge-shaped again and longer than broad distally. 

 The lower discoidal Ijrachials have a sliglitly indicateil ])lunt dorsal keel, 

 the remainder have rather prominent distal ends. 



Pi longer than V^, slender, with about twenty ai^proximately square 

 joints; following pinnules somewhat stouter, gradually decreasing in 

 length, then gradually increasing again distally to tlie length of IV The 

 genital pinnules are slender, with no expansion of the joints. 



Color. — Light yellow, or yellowish white, slightly tinged with brownish. 



Distribution . — INIeangis Islands, northward to Korea. 



Depth. — 95 to 500 fathoms. 



Included species: 



Clilorometra aculeata (P. H. Carpenter) 

 " garrettiana (A. H. Clark). 



24. Crinometra gen. nov. 

 Genotype. — Comatula brevipinna Pourtales, 1868. 



This genus is the Caribbean representative of Pachylometra, with which 

 it agrees in most of its characters. The arms are ordinarily 20 to 30, the 

 II Br series 4 (3 -t- 4 ) or 2, some species usually all 4 (3+4) others all 2, but 

 the majority mixed, the iii Br series 2 (1 -f- 2) developed interiorly in 

 1, 2, 2, 1 order. The whole animal is robust, the calyx and arm leases 

 large and broad, the cirri stout, as in Pacliylometra. It difters markedly 

 from Pachylometra, however, in the great length of the proximal, and 

 shortness of the middle and distal pinnules, and in the very strong cari- 

 nation of the former. The piiumles decrease rai)idly in length from P, to 

 Pg or V-, the remaining pinnules being not quite half as long as Pj, the 

 distal pinnules no longer than those in the middle of the arm ; the genital 

 pinnules are more abruptly expanded than are those of Pachylometra, and 

 the brachials are more strongly overlapping, while a very strong tubercu- 

 lous ornamentation is usually developed basally. . 



Color. — Yellow, the calyx and arm bases frecjuently yellow l)r()\vn ; large 

 specimens are more or less brownish. 



Distribution. — Gulf of Mexico, and northern part of the Caribbean Sea. 



Depth.— l<dl to 270 fathoms.* 



Included species:! 



Pachylometra brevipinna ( Pourtalt-s ) 



" imbricata (A. H. Clark). 



• According to Carpenter. 



+ There are also several afklitioiuil undescribed species. 



