1915.] NATURAL SCIENCES OF PHILADELPHIA, 43^ 



a new classification of the ophiuroidea: with descriptions of 



new genera and species. 



by h. matsumoto. 

 Contents. 



PAGE 



Introductory 43^ 



Subclass I. (Egophiuroida 45 



Subclass II. Myophiuroida 45' 



Order i. Phrynophiurida 46 



Family 1. Ophiomyxidse 40 



Subfamily 1. Ophiomyxinse 47 



Subfamily 2. Ophiobyrsinse 50 



Family 2. Trichasteridse 51 



Subfamily 1. Asteronychinae 52 



Subfamily 2. Trichasterinse 52 



Subfamily 3. Asteroschematinse 52 



Family 3. Gorgonocephalidse ; 55 



Subfamily 1 . Gorgonocephalinse 56 



Subfamily 2. Astrotominse 59 



Order ii. Lsemophiurida 61 



Family 1. Ophiacanthidis 62 



Family 2. Hemieuryalidai 65' 



Subfamily 1. Ophiochondrina? 65 



Subfamil}^ 2. Hemieuryalinaj 66 



Order iii. Gnathophiurida .■.-...■.; ;.. 66 



Family 1. Amphilepididse 66 



Family 2. Amphiuridse 68 



Subfamily 1. Ophiactininte 69 



Subfamily 2. Amphiurimr 69 



Family 3. Ophiotrichida' 74 



Order iv. Chilophiurida 74 



Family 1. Ophiolepididse 75 



Subfamily 1. Ophiomastinse 76 



Subfamily 2. Ophiolepidina? ' 81 



Family 2. Ophioleucida; 83 



Family 3. Ophiodermatidse 83 



Subfamily 1. Ophiarachnina> 83 



Subfamily 2. Ophiodermatinse 87 



Family 4. Ophiochitonidse ). 88 



Subfamily 1. Ophiochitoninse 88 



Subfamily 2. Ophionereidinaj 90 



Family 5. Ophiocomidae 91 



Subfamily 1. Ophiocominse 92 



Subfamily 2. OphiopsilinEe 92 



Introduction. 



The present study was undertaken at the suggestion of Prof. Goto^ 

 of the Imperial University of Tokyo; and to him my hearty thanks 

 are due for supervision and the revision of part of the manuscript. 



My first purpose was merely to identify and name species. But 



