A MONOGRAPH OF THE EXISTING CRINOIDS 65 



The following arrangement of the recent comatulids is adopted herein: 

 Order Comatulida: 



Suborder Oligophreata 



Superfamily Coruasterida 

 Family Comasteridae 



Subfamily Capillasterinae. 

 Subfamily Comactiniinae. 

 Subfamily Comasterinae 

 Superfamily Mariarnetrida 

 Family Zygometridae. 

 Family Eudiocrinidae. 

 Family Himerometridae. 

 Family Mariametridae. 

 Family Colobometridae. 

 Superfamily Tropiometrida 

 Family Tropiometridae. 

 Family Calometridae. 

 Family Thalassometridae 

 Subfamily Ptilometrinae. 

 Subfamily Thalassometrinae. 

 Family Charitometridae. 

 Suborder Macrophreata 



Family Antedonidae 



Subfamily Autedoninae. 

 Subfamily Thysanometrinae. 

 Subfamily Perometriiiae. 

 Subfamily Zenometrinae. 

 Subfamily Heliometrinae. 

 Subfamily Bathymetrinae. 

 Family Notocrinidae. 

 Family Pentametrocrinidae. 

 Family Atelecrinidae. 



PRESERVATION OF SPECIMENS 



As a result of his long experience at the Naples Station, Dr. Salvatore Lo Bianco 

 found that Antedon may be satisfactorily preserved by direct immersion in 70 per 

 cent alcohol. Leptometra, however, on account of its greater tendency to autotomy, 

 must be killed in 90 per cent alcohol. The vessel should be shaken vigorously in 

 order to hasten death and to prevent the animals from breaking off their arms. 

 When there is doubt about the species 90 per cent alcohol should be used. 



Pentacrinoids should first be narcotized with one-tenth of 1 per cent chloral 

 Irydrate, a process requiring from two to four hours. If they are then hardened in 

 alcohol they will remain with the arms perfectly distended. The more advanced 

 stages are best killed with saturated sublimate; but they should remain only for a 

 few moments in this solution in order to avoid damage to the skeletal structures. 

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