266 ART. 2. — H. MATSUMOTO : 



This genus contains a single species, G. mollis Lütken à 



MOETENSEN, 1899. 



Lütken & Moetensen have estabhshed the present genus to 

 include two species, i.e. G. mollis and G. cœhirescens Lütken & 

 Moetensen, 1899. As far as I can judge, the two species are 

 not so closely related to each other as to justify their inclusion 

 in the same genus, unless Ophkira in a very wide sense be made 

 to serve for it. Judging from the original description and figures, 

 G. cœhirescens appears to be conspecific with, or at least very 

 closely related to, Ophiura flagellata, which is evidently a typical 

 member of Ophiura. The genotype, G. mollis, however, rather 

 reminds us of such species as Amphiophiura ponderosa, A. hadra, A. 

 penichra, &c., by its high disk, cylindrical arms and especially by its 

 squarish and flat genital, as well as comb, papillai. The characters, 

 by which G. mollis is distinguished from the above mentioned 

 species of Amj)hio2)lii2ira, are the naked disk and the narrow and 

 bar-like radial shields, which are widely separated from one an- 

 other. I am inclined to look upon the two peculiarities of G. 

 mollis as the essential characters of the present genus. 



JloïnalopUiuva clasta Clakk. 



Ophiura clasta : Claek, Bull. Ü. S. Nat. Mus., LXXV, 1911, p. 64, 

 fig. 16. 



HomahpJiiura clasta : Claek, Mem. Mus. Comp. Zool., XXV, 1915, 

 p. 326.^> 



Off Omai Zaki ; 507-918 fathoms. 



Ophiura (Lamaeck, 1816) restr. 

 Disk low and very flat, covered with rather small, imbricating 



1) Ihmalophiura Clakk, 1915, is stated by C. to include OpMoglyphn biortata Lyman, 1878 

 (the genotype), 0. confragosa Lyman, 1878, 0. intorta Lyman, 1878, Q. ahyssorum Lyman, 1873, 



