292 BULLETIN 82, UNITED STATES NATIONAL MUSEUM. 



inarometra psyche. Psathyrometra borealis. 



Thysanometra tenelloides. Psathyrometra fragilis. 



Coccometra hagenii. Psathyrometra antarctica. 



Erythrometra ruber. Psathyrometra gracillima. 



Erythrometra australis. Eumorphometra concinna, 



Heliometra maxima. Leptometra celtica. 



Heliometra glacialis. Isometra vivipara. 



Anthometra adriani. Hathrometra pro/tea.. 



Florometra mariw. Fariometra explicata. 



Florometra laodice. Trichometra culiensis. 



Florometra asprrrima. Trichometra vexator. 



Florometra serratissima. Thaumatometra nutrix. 



Florometra magellanica. Thaumatocrinus boreoiis. 



Cyclometra clio. Pentametrocrinus japonicus. 



Sarametra triserialis. Pentametrocrinus varians. 

 Zenometra- columnaris. 



a'. Spicules are present In the tentacles, or the tip is protected by a more or less developed plate. 

 6 1 . Tip of the tentacles naked and unprotected. 

 c 1 . Spicules Irregularly scattered. 



a 1 . Spicules not localized, and few in number. 



Neocomatella pulchella. Comatula pectinata. 



Neocomatella alata. Oomaster minimus, 

 d". Spicules more or less definitely localized. 



e 1 . Spicules confined to the proximal portion of the tentacle. 

 f 1 . Spicules few In number. 



Comantheria Inarms. Prometra chadwickl. 



Comanthus roahJbergii. Oligometra serripinna. 



Comanthns parvicirra. Tropiometra macrodi-sous. 



Zygometra comata. Tropiometra imdica. 



Catoptometra hartlaubi. Compsometra loveni. 



Oxymetra finschii. Coccometra hagenii. 



Dichrometra doderleini. Leptometra celtcia. 



Lamprometra palmata. Isometra vivipara. 



Cenometra unicornis. Hathrometra prolixa. 



Cyllometra disciformis. Hathrometra tenella. 



Cyttometra albopurpurea. Thaumatocrinus rngosus. 

 Decametra tigrina. 



f. Spicules numerous. 



Comatilia iridometriformis. 



e*. Spicules occurring only in the distil portion of the tentacle. 

 Oceanometra gigantea. 



c 1 . Spicules arranged in broad bands. 



d 1 . A single broad band of spicules along the outer side of the tentacles, which may 



reach nearly to the tip. 



Comissia lutkeni. C'omaster distincta. 



Leptonemaster vcnustus. Comaster parvus. 



Oomatonia cristata. Comaster taviana. 



Comaster novccguinea;. Comunthus lenhami. 



Comaster multibrachiata. Comanthus sanwana. 



Comaster fruticosus. Eitdiocrinus indivisiis. 



