A MONOGRAPH OF THE EXISTING CRINOIDS 59 



Monachocrinus (genotype Monachocrinus sexradiaius, sp. nov.). 

 The following new species was described : 



Monachocrinus sexradiatus . 



Detailed keys to the subfamilies and genera of the family Antedonidae were 

 published on October 4, and on May 16 in two separate papers a new Philippine 

 comatulid, Prometra longipinna, was described, and the crinoid fauna of New Zealand 

 and Tasmania was discussed. 



From New Zealand the following species were listed: 



Comanthus benhami A. H. Clark. Comanthus novat >zea1andiae,sp.nov. 



Argyrometra mortenseni A. H. Clark, 

 and from Tasmania the following were given : 



Comanthus tasmaniae. Ptilometra macronema. 



Comanthus pledrophorum. Cosmiometra dasybrachia. 



Comissia spanoschistum. Compsometra incommoda. 



Austrometra thetidis. Metacrinus cyaneus. 



Comanthus novaezealandiae and Comanthus tasmaniae were described in detail. 

 The classification of the comatulids was presented in full for the first time in 

 the memoir on the unstalked crinoids of the Siboga expedition published in March, 

 1918, and that of the stalked types was brought practically into its final form by a 

 short paper published on March 4, 1919, in which Holopus was shown to be closely 

 related to the pentacrinites and to the comatulids. 



Since the publication of the Siboga report there have been no changes in the 

 classification of the comatulids by the present author. 



In 1917 Dr. Th. Mortensen published a preliminary description of a remarkable 

 new genus and species of comatulid from the Antarctic which he called Notocrinus 

 virilis. This was described in much greater detail in 1918, when it was made the 

 type of a new family, the Notocrinidae. Together with Notocrinus virilis, Mortensen 

 described Isometra vivipara, and in his later memoir he added Thaumatometra nutrix. 

 In 1922 Dr. Torsten Gisl^n published a very extensive work on the crinoids 

 collected by Dr. Sixten Bock in the Bonin Islands and Japan. In this there were 

 described two new genera, Didontometra and Clarkometra, and the following new 

 species : 



Comatella brachycirra. Eudiocrinus gracilis var. pulchellus. 



Comissia peregrina var. magnifica. Eudiocrinus loveni. 



Comissia ignota var. minuta. Cyllometra pulchella. 



Comaster delicata var. grandis. Stenometra dentata. 



Comantheria grandicalyx v&r.fagel- Perissometra aranea. 



lipinna. Didontometra bocki. 



Comanthus pardcirra f. comasteri- loxometra aequipinna. 



pinna. Psathyrometra wireni. 



Comanthus parmcirra f . comanthi- Clarkometra elegans. 



pinna. Metacrinus nobilis var. tenuis. 



Catoptometra magnifica var. minor. Metacrinus interruptus f. ornatus. 



