A MONOGRAPH OF THE EXISTING CRINOIDS 83 



e-. Brachials beyond tlie basal triangular, about as long as broad, becoming elongate 

 wedge-shaped distally (Bahamas and Dry Tortugas, throughout the Caribbean Sea, 



and southward to Bahia, Brazil; 0-355 meters) Nemaster, p. 214. 



(P. Distal cirrus segments not carinate dorsally, each bearing a straight transverse ridge; 

 distal ends of the basal segments of the lower pinnules with greatly flaring spiny distal 

 ends, projecting as rough spurs on the aboral side (Bass Strait and the coast of Vic- 

 toria; 119[?91]-183 [?3I1] meters) Comanthoides, p. 240. 



<?. First pinnule of the undivided arms on the second brachial; a syzygy between brachials 

 3-1-4 or 1 + 2, or in both places, but never between brachials 2 + 3. 

 dK All the division series of 2 elements like the IBr series. 



e'. Cirri well developed, numerous, and rather long, with the distal segments much shorter 

 than the earlier, broader than long, and each tearing a dorsal spine or tubercle; ele- 

 ments of the division series united by synarthry, though the union may be so close 

 as to appear externally lilce a syzygy. 

 /'. Brachials beyond the basal wedge-shaped or almost oblong, broader than long 

 (Salomon, Coin Peros, the Maldive Islands, and Ceylon to the Abrolhos Islands, 

 Western Australia, Torres Straits, New Caledonia, Tonga, Fiji, Samoa, the Bonin 

 Islands, southwestern Japan, the Philippines, and Macclesfield Bank; 0-210 



meters) Comatella, p. 89. 



p. Brachials beyond the basal triangular, about as long as broad. 



g'. Centrodorsal moderate in size or small, with the cirii arranged in irregular rows (St. 

 Paul's rocks northward, throughout the Caribbean Sea, to the Dry Tortugas and 

 Bahamas; Canary Islands to Brittany; 13-1,710 meters). Neocomatella, p. 122. 

 g-. Centrodorsal large and broad, thick discoidal, with the cirri arranged roughly in 25 

 columns (Kei and Philippine Islands; 256-275 meters). Palaeocomatella, p. 153. 

 «'. Cirri poorly developed, arranged in a single more or less deficient row, very few in 

 number, short, composed of subequal segments, all of which, except for the first or 

 first 2, aie longer than broad; outer cirrus segments without dorsal spines or tubercles, 

 but an opposing spine is usually present; elements of the division series united by 

 syzygy (Aru Islands and northern Australia south to Baudin Island, Western Australia, 

 and Port Molle, Queensland; Java and Singapore; 0-69.4 meters). Comatula, p. 302. 

 (P. Some, or all, of the division series of 4 elements. 

 e'. IIBr series all, mostly, or in part, of 4 elements. 

 /'. Elements of the IBr series and the first 2 ossicles following every axillary united by 

 syzygy; IIBr series 4 (1 + 2, 3 + 4), or partly 4 (1 + 2, 3 + 4) and partly 2 (1 + 2); 

 IIIBr and following series 2 (1 + 2) or 2, very exceptionally 4 (3 + 4) (Maldive 

 Islands to Australia, south to Port Walcott, Western Australia, and Port Molle, 

 Queensland, Fiji, the Gilbert [Kingsmill] Islands, southern Japan, the Philippines, 

 Macclesfield Bank, and the coast of China; 0-216 [?538] meters) _ Comaster, p. 409. 

 p. Elements of the IBr series and the first 2 ossicles following ever.v axillary united by 

 synarthry; IIBr series 4 (3 + 4), or partly 4 (3 + 4) and partly 2. 

 ff'. Distal cirrus segments with or without dorsal tubercles or spines, but never with a 

 straight transverse ridge. 

 hK Some or all of the IIIBr series 4 (3 + 4). 



i'. All of the IIIBr series 4 (3 + 4) (Cape of Good Hope, Madagascar, Mauritius, 

 the Seychelles, and Baluchistan to Australia, including the whole southern 

 coast, Tasmania, New Zealand, New Caledonia, Fiji, Tonga, Samoa, the 

 Gilbert, Caroline, Pelew, and Bonin Islands, southern Japan, the Philippines, 

 Hong Kong, and Amoy, China; 0-256 [?548] meters). Comanthus, p. 527. 

 t*. IIIBr series partly 4 (3 + 4) and partly 2. 



